2515| 4
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深內能孔怎么鏜能保證公差? |
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點評
呵呵,這哥子算得太精確了,一般為1:3或1:4就差不多了!
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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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