7124| 13
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為什么篩眼不會被堵住? |
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點評
這里不僅僅是靜動摩擦問題,還有振動加速度
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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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