半点优点没有，更容易拧圆了角，拧力矩大的螺栓我只用六角的

来源: MoonRiverMe 于 2019-08-19 19:31:29 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

Change Ad Consent