工程上常用的投影有几种（）_精华吧

工程上常用的投影有几种（）

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工程上常用的投影有几种（）

A.有4种

B.有3种

C.有2种

D.有1种

正确答案：有4种

Tag：画法几何及土木工程制图工程时间：2022-02-17 20:46:20

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