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分度圆直径
pitch diameter
standard pitch diameter
[机] reference diameter
standard pitch diameter
[机] reference diameter
- 选取适当的车头行星轮的分度圆直径，可以有效地控制车方原理的直线度误差。
The principle straightness error of cutting square in work-pieces can be controlled by choosing a suitable pitch diameter of the planetary gear in the machine tools. - 然后，通过计算得到齿轮的模数，齿数及分度圆直径，并校核尺寸是否符合实际要求；
Then, calculate the modulus of gear, number of teeth and sub-degree diameter and check whether the size is fit for the actual requirements;
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