那是冲压的，不是铸造的。工程上没有“纯钢”的概念

来源: 89501200 于 2010-05-25 13:52:35 [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.