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再什么条件下,相贯线是平面曲线?曲线的正面投影为相交两直线?

问答题
2021-12-31 23:02
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正确答案

当两个外切于同一球面的任意回转体相贯时,其相贯线为平面曲线,此时,当两回体的轴线都平行于其基本投影面则相贯线在该面上的投影为相交两直线。


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