4674| 6
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曲柄滑塊問題中假設連桿受力方向沿桿方向正確嗎? |
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點評
樓主的方程式在哪里
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小黑屋|手機版|Archiver|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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