试题与答案

相邻两牙在中径线上对应两点间的轴向距离称为()。A.小径 B.螺距 C.旋合长度

题型:单项选择题

题目:

相邻两牙在中径线上对应两点间的轴向距离称为()。

A.小径

B.螺距

C.旋合长度

答案:

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