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哈哈哈，原理很簡單，卻給他們想出來了。只是用車鍊再帶動一個反向轉動的飛輪。成本很低呢！
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Reader Comments (Page 1 of 1)
史艷文 @ Sep 5th 2008 2:49AM
哈哈哈，原理很簡單，卻給他們想出來了。
只是用車鍊再帶動一個反向轉動的飛輪。
成本很低呢！