60kg/mm2的结构钢根本算不上什么高精尖的东西。

来源: ZuoLuo 于 2016-11-30 19:28:59 [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.