螺孔和螺栓的螺纹都圆了, 锯掉螺栓前端, 会让新的螺纹加入战斗, 增加不可靠性。

来源: 老九不能走于 2018-11-14 12:34:51 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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