算平均50kg體重-被繩子借掉1/3=35kg.杠杆10倍也有350kg在隼頭上。這還是靜態的

來源: 味苦於 2018-05-17 08:19:41 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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