单项选择题
A.直齿圆柱齿轮传动 B.斜齿圆柱齿轮传动 C.螺旋齿轮传动 D.人字齿圆柱齿轮传动
A.4200mm B.4400mm C.5000mm D.4000mm
A.200mm B.300mm C.350mm D.1100mm
A.200mm B.300mm C.350mm D.1250mm
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