雨过留痕 新手上路 VIP 注册 2004-02-11 消息 19,066 荣誉分数 243 声望点数 0 2004-10-03 #8 最初由 京华倦客 发布 每人每日十帖 点击展开... 哈，我那10帖就转给你了，哈， 辛苦你了，哈!
Stifler 资深人士 VIP 注册 2003-12-29 消息 22,416 荣誉分数 92 声望点数 208 2004-10-04 #13 different force systems are said to be equivalent if they produce the same effort or if one can be transferred into the others.
different force systems are said to be equivalent if they produce the same effort or if one can be transferred into the others.
Stifler 资深人士 VIP 注册 2003-12-29 消息 22,416 荣誉分数 92 声望点数 208 2004-10-04 #14 M=r x F1+r x f2=r*(F1+F2) varignon's theorem
一帮懒淫
