不等径圆柱体正相贯，相贯线具有以下哪些特征（两圆柱轴线为投影面垂直线时）。

2024-01-13

不等径圆柱体正相贯，相贯线具有以下哪些特征（两圆柱轴线为投影面垂直线时）。

A.小圆柱穿过大圆柱体表面

B.相贯线是两个圆柱体的共有线

C.在两圆柱投影为非圆的投影上，相贯线分布在大圆柱轴线两侧，并朝该轴弯曲。

D.近似画法中，相贯线以较小圆柱体半径为半径画圆弧。

参考答案：

小圆柱穿过大圆柱体表面；相贯线是两个圆柱体的共有线；在两圆柱投影为非圆的投影上，相贯线分布在大圆柱轴线两侧，并朝该轴弯曲。

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