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问题详情

一个齿轮上的圆有（）

A、齿顶圆和齿根圆

B、齿顶圆，分度圆，基圆和齿根圆

C、齿顶圆，分度圆，基圆，节圆，齿根圆

D、分度圆，基圆和齿根圆

时间：2021-09-01 15:58 关键词：联大河南理工大学机械设计基础

答案解析

B

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