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Xibei Bearing Co.,Ltd.
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Angular Contact Ball Bearing 7252 BM
产品分类 :
服飾及紡織->配件->包包配件
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产品规格
Model No: 7252 BM
Country
CN
Brand
NXZ
Packing
Standard Export Package
Payment Term
L/C,T/T
产品描述
<p class="MsoNormalIndent" style="text-indent:0cm;">
<br />
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
<b>Angular contact ball bearings</b>
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
<b> </b>
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
Angular contact ball bearing has high
limit rotational speed, they can carry radial load and axial load
simultaneously, they can also withstand purely radial load. The axial load
carrying capacity depends on the magnitude of contact angle and increases with
increasing contact angle.
</p>
<p class="MsoNormalIndent" style="text-indent:20.55pt;">
<b>Structures</b>
</p>
<p class="MsoNormalIndent" style="margin-left:39.0pt;text-indent:-18.0pt;">
1.
Non-separable
angular contact ball bearings
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
This inner ring and outer ring of this
type of bearings cannot be separated and comprises following structures:
</p>
<p class="MsoNormalIndent">
Contact
angle α=15° counter bore on outer
ring,7000Ctype
</p>
<p class="MsoNormalIndent">
Contact
angle α=25° counter bore on outer
ring,7000ACtype
</p>
<p class="MsoNormalIndent">
Contact
angle α=40° counter bore on outer
ring, 7000B type
</p>
<p class="MsoNormalIndent" style="margin-left:39.0pt;text-indent:-18.0pt;">
2. Four-point
contact ball bearings
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
This type of bearings is separable
bearings. Whereof, QJ0000 type has two-piece inner ring and QJF0000 type has
two-piece outer ring. Their contact angles are same as 35°.When received no
load or pure radial load, the steel balls of the ball bearing contact with the
four points of the rings. When it is received a pure axial load, the steel
balls perform a two-point contact with the ring. In addition, besides the axial
load from both directions, this kind of bearing can take torque-load as well.
</p>
<p class="MsoNormalIndent" style="margin-left:39.0pt;text-indent:-18.0pt;">
3.
Double
row angular contact ball bearings
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
This kind of bearings can accommodate
radial loads as well as axial loads acting in both directions; they can also
take loading moment. They can restrain the axial displacement from both
directions of the shaft or housing; the contact angle is 30° (or 40°)
</p>
<p class="MsoNormalIndent">
<b>Permissible tilt angle</b>
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
There is only a little inclination
between the inner ring and outer ring of angular contact bearings, the
permissible tilt angle varies according to the internal clearance when the
bearings are operating, the bearing dimensions, internal design, force and loading
moment received by the bearings. The value of the maximum permissible tilt
angle should be able to ensure that no much extra stress to be generated inside
the bearings.
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
The tilt angle existing between the
inner ring and outer ring will influence the bearing service life. Meanwhile,
the running accuracy is decreased down and noise increased.
</p>
<p class="MsoNormalIndent">
<b>Tolerance and clearance</b>
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
The tolerances of general angular
contact bearings are class normal P0, class P5 and P6. Class P4 and P2 are applicable
to machine tool spindles and bearing amount in pairs.
</p>
<p class="MsoNormalIndent">
Clearance
of single row angular contact bearing is decided by the contact angle, which is
guaranteed by manufacturing.
</p>
<p class="MsoNormalIndent">
Axial clearance of Four-point contact ball bearings is listed in
table 1.
</p>
<p class="MsoNormalIndent">
<b>Cage material </b>
</p>
<p class="MsoNormalIndent" style="text-indent:0cm;">
Generally, the cage of angular contact
bearing is pressed cage of steel sheet or brass cage, and it is solid brass
cage for two row angular contact bearing.
</p>
<p class="MsoNormalIndent">
<b>Dynamic equivalent radial
load</b>
</p>
<p class="MsoNormalIndent">
Single-row
angular contact ball bearings with a contact angle of 15°
</p>
<p class="MsoNormalIndent">
Single
bearing or bearing in pairs(7000
C.7000
C/DT)
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤e P<sub>r</sub>=F<sub>r</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>e P<sub>r</sub>=0.44F<sub>r</sub>+YF<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Back-to-back
and face to face arrangements(7000
C/DB.7000 C/DF)
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤e P<sub>r</sub>=F<sub>r</sub>+Y<sub>1</sub>F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>e P<sub>r</sub>=0.72F<sub>r</sub>+Y<sub>2</sub>F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Single-row
angler contact ball bearings with a contact angle of 25°
</p>
<p class="MsoNormalIndent">
Single
bearing or bearing in pairs(7000
AC.7000
AC/DT)
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤0.68 P<sub>r</sub>=F<sub>r</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>0.68 P<sub>r</sub>=0.41F<sub>r</sub>+0.87F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Back-to-back
and face to face arrangements(7000
AC/DB.7000 AC/DF)
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤0.68 P<sub>r</sub>=F<sub>r</sub>+0.92F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>0.68 P<sub>r</sub>=0.67F<sub>r</sub>+1.41F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Single-row
angular contact ball bearings with a contact angle of 40°
</p>
<p class="MsoNormalIndent">
Single
bearing or bearing in pairs (7000 B.7000
B/DT)
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤1.14 P<sub>r</sub>=F<sub>r</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>1.14 P<sub>r</sub>=0.35F<sub>r</sub>+0.57F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Back-to-back
and face to face arrangements(7000 B/DB.7000
B/DF)
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤1.14 P<sub>r</sub>=F<sub>r</sub>+0.55F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>1.14 P<sub>r</sub>=0.57F<sub>r</sub>+0.93F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Four
point contact ball bearings with a contact angle of 35°
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤0.95 P<sub>r</sub>=F<sub>r</sub>+0.66F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>0.95 P<sub>r</sub>=0.6F<sub>r</sub>+1.07F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Double-row
angular contact ball bearings with a contact angle of 45°
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>≤1.34 P<sub>r</sub>=F<sub>r</sub>+0.47F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
F<sub>a</sub>/F<sub>r</sub>>1.34 P<sub>r</sub>=0.54F<sub>r</sub>+0.81F<sub>a</sub> <b></b>
</p>
<p class="MsoNormalIndent">
<b>Static equivalent radial
load</b>
</p>
<p class="MsoNormalIndent">
Single-row
angular contact ball bearings with a contact angle of 15°
</p>
<p class="MsoNormalIndent">
For
single bearing or bearing in pairs(7000 C.7000 C/DT)
</p>
<p class="MsoNormalIndent">
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=0.5F<sub>r</sub>+0.46F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
P<sub>0r</sub><F<sub>r</sub> P<sub>0r</sub>=F<sub>r</sub>
</p>
<p class="MsoNormalIndent">
For
back-to-back and face-to-face arrangements (7000 C/DB.7000 C/DF)
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=F<sub>r</sub>+0.92F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Single-row
angular contact ball bearings with contact angle of 25°
</p>
<p class="MsoNormalIndent">
For
single bearing or bearing in pairs (7000 AC.7000 AC/DT)
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=0.5F<sub>r</sub>+0.38F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
when
P<sub>0r</sub><F<sub>r</sub> let P<sub>0r</sub>=F<sub>r</sub>
</p>
<p class="MsoNormalIndent">
For
two bearings in back-to-back and face-to-face arrangements
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=F<sub>r</sub>+0.76F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Single-row
angular contact ball bearings with contact angle of 40°
</p>
<p class="MsoNormalIndent">
For
single bearing or bearing in pairs
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=0.5F<sub>r</sub>+0.26F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
when
P<sub>0r</sub><F<sub>r</sub> let P<sub>0r</sub>=F<sub>r </sub>
</p>
<p class="MsoNormalIndent">
For
two bearings in back-to-back and face-to-face arrangements
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=F<sub>r</sub>+0.52F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Four
point contact ball bearings
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=F<sub>r</sub>+0.58F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
Double-row
angular contact ball bearings with contact angle of 45°
</p>
<p class="MsoNormalIndent" style="text-indent:84.0pt;">
P<sub>0r</sub>=F<sub>r</sub>+0.44F<sub>a</sub>
</p>
<p class="MsoNormalIndent">
F<sub>r</sub> Actual radial load of the bearing.
</p>
<p class="MsoNormalIndent">
F<sub>a </sub> Axial load of the bearing
</p>
<p class="MsoNormalIndent">
The
values of e .Y .Y<sub>1</sub> .Y<sub>2 </sub>see Table
2.
</p>
<p class="MsoNormalIndent">
<b>Table 1 Axial internal clearance of four point
contact ball bearings</b>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<b> </b><b>μ</b><b>m</b>
</p>
<table class="MsoNormalTable" style="border:none;" cellspacing="0" cellpadding="0" border="1">
<tbody>
<tr>
<td colspan="2" style="border:solid windowtext 1.0pt;" width="82">
<p class="MsoNormalIndent" style="margin-left:-1.1pt;text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Nominal bore diameter d</span>
</p>
<p class="MsoNormalIndent" style="margin-left:-1.1pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">mm</span>
</p>
</td>
<td colspan="2" style="border:solid windowtext 1.0pt;" width="83">
<p class="MsoNormal" style="text-align:center;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">C2
clearance</span><span style="font-family:Arial , sans-serif;"></span>
</p>
</td>
<td colspan="2" style="border:solid windowtext 1.0pt;" width="83">
<p class="MsoNormal" style="text-align:center;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Standard
clearance</span>
</p>
</td>
<td colspan="2" style="border:solid windowtext 1.0pt;" width="83">
<p class="MsoNormal" style="text-align:center;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">C3</span>
</p>
<p class="MsoNormal" style="text-align:center;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">clearance</span>
</p>
</td>
<td colspan="2" style="border:solid windowtext 1.0pt;" width="104">
<p class="MsoNormal" style="text-align:center;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">C4</span>
</p>
<p class="MsoNormal" style="text-align:center;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">clearance</span>
</p>
</td>
</tr>
<tr>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Over</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">To</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:6.5pt;font-family:Arial , sans-serif;">Min</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Max</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:6.5pt;font-family:Arial , sans-serif;">Min</span><span style="font-size:9.0pt;font-family:Arial , sans-serif;"></span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Max</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Over</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">To</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:6.5pt;font-family:Arial , sans-serif;">Min</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="62">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Max</span>
</p>
</td>
</tr>
<tr>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">10</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">18</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">40</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">60</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">80</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">100</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">140</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">180</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">220</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">260</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">18</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">40</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">60</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">80</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">100</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">140</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">180</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">200</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">260</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">300</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">15</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">26</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">36</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">46</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">56</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">66</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">76</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">96</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">115</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">135</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">55</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">66</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">86</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">96</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">116</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">136</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">156</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">176</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">195</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">215</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">45</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">56</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">76</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">86</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">96</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">116</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">136</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">156</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">175</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">195</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">85</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">106</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">126</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">136</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">156</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">176</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">196</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">216</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">235</span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormal" align="left">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">275</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">75</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">96</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">116</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">126</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">135</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">156</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">176</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">196</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">215</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">255</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">115</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">146</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">166</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">176</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">196</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">216</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">236</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">256</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">295</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">335</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="41">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">105</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">136</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">156</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">166</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">176</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">196</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">216</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">236</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">275</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">295</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="62">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">145</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">186</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">206</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">216</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">236</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">256</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">276</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">296</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">335</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"> </span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">355</span>
</p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormalIndent" style="text-align:right;text-indent:42.0pt;" align="right">
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:42.0pt;" align="center">
<b>Table 2 <a>Calculate
Coefficient</a></b><b> </b>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:42.0pt;" align="center">
<b> </b><b>μ</b><b>m</b><b></b>
</p>
<table class="MsoNormalTable" style="border:none;" cellspacing="0" cellpadding="0" border="1">
<tbody>
<tr>
<td style="border:solid windowtext 1.0pt;" width="91">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;"><span></span><b><span style="font-size:12.0pt;font-family:Arial , sans-serif;"></span></b></span>
</p>
<br />
</td>
<td style="border:solid windowtext 1.0pt;" width="91">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">e</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="84">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Y</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="84">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Y<sub>1</sub></span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="77">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">Y<sub>2</sub></span>
</p>
</td>
</tr>
<tr>
<td style="border:solid windowtext 1.0pt;" width="91">
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.172</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.345</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.689</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.03</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.38</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">2.07</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">3.45</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">5.17</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">6.89</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="91">
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.38</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.4</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.43</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.46</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.47</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.5</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.55</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.56</span>
</p>
<p class="MsoNormalIndent" style="margin-left:20.7pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">0.56</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="84">
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.47</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.4</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.3</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.23</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.19</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.12</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.02</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.45pt;text-indent:5.4pt;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="84">
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.65</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.57</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.46</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.38</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.34</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.26</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.14</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.12</span>
</p>
<p class="MsoNormalIndent" style="text-align:center;text-indent:0cm;" align="center">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">1.12</span>
</p>
</td>
<td style="border:solid windowtext 1.0pt;" width="77">
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">2.39</span>
</p>
<p class="MsoNormalIndent" style="margin-left:15.65pt;text-indent:0cm;">
<span style="font-size:9.0pt;font-family:Arial , sans-serif;">2.28</span&g
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