如果轴承没有超出允许的最高温度(表1.7)加热，长度变化如图1.72不会发生。
If bearings are not heated beyond the permissible maximum temperature (Table 1.7), the length changes illustrated in Figure 1.72 do not occur.
如果订购地轴承架，则最小长度尺寸为阀门中心至地轴承架底座的长度。
Minimum dimension from centerline of valve to base of floorstand when ordered with position indicating floorstand.
轴承一般设一个小轴向间隙，以弥补轴和轴承座的长度变化。
The bearings are generally installed with a small axial clearance in order to compensate for length variations of shaft and housing.
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