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普通平键联接的装配图画法

A.键的侧面与轴上键槽侧面只画一条线
B.键的上底面与轮毂上的键槽底面间要画两条线
C.在剖视图中,键被剖切时必须绘制剖面线
D.在剖视图中,当剖切平面通过键的纵向对称面时,键按不剖绘制
E.键的侧面与轴上键槽侧面画两条线
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