10079| 28
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為什么降低轉速能改善絲錐的異常折斷? |
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點評
感謝回復
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點評
摩擦力,扭力
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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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