如果大型卡車和貨物20噸重量加速度，一次能破壞多少根懸索？貨物很可能是大型鋼構或混凝土構件。

來源: reader007 於 2016-04-20 09:41:22 [舊帖] [給我悄悄話] 本文已被閱讀：次

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