题目内容

机件上的肋板、轮辐、薄壁结构，在绘制剖视图时应（）

A. 按纵向剖切，不画剖面符号
B. 按横向剖切，不画剖面符号
C. 按横向和纵向剖切，都不画剖面符号
D. 按横向和纵向剖切，都要正常画剖面符号

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