B2L2 发表于 2013-12-5 04:11
Nice job in confusing people, Norman. LOL. Fall line is a line, why it needs to be at a point A, B ...
B2L2 发表于 2013-12-5 20:24
Norman, I really think you have everything mixed up on this line: "東西放在一個斜坡上,物體重量加地 ...
snowrider 我也不信! 瓜瓜的思緒是最 ... sophisticated 的了! 发表于 1 小时前
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