23937| 21
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思考:單向旋轉怎么變成一個直線往復運動? |
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點評
是將單向旋轉運動轉化為直線往復運動。皮帶輪要怎么實現?
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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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