要造出个“弯矩”

来源: slow_quick 于 2020-06-13 22:50:33 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

不是锤子能解决的问题，是要造出个“弯矩”

等有时间我画个图你就知道了

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