5455| 13
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哪位物理大神能幫幫我啊 |
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點評
軸是實心的,力是由中間的液壓產生的
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Archiver|手機版|小黑屋|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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