试题与答案

为什么螺纹联接结构中,支承螺母的端面常做成凸台和沉头座?

题型:问答题 简答题

题目:

为什么螺纹联接结构中,支承螺母的端面常做成凸台和沉头座?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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