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50000r/min動密封怎么解決?誰能做? |
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點評
出來后在變速么。力的傳遞又沒減小很多。
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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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