滚得多远，和滚物与滚动表面间摩擦系数有关。

来源: 皆兄弟也于 2011-11-28 14:37:10 [博客] [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.