老J是搞機電的？這裏的機械設計讓俺太佩服了，特別是縫紉機和火車~根本不用高科技，隻要高智商：）

來源: qiasini 於 2011-12-17 19:14:20 [舊帖] [給我悄悄話] 本文已被閱讀：次

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