3149| 6
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用钢加工壁厚2.27mm的圆筒,高70 ,内外表面的公差都是5S ,这个很难吗? |
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Archiver|手机版|小黑屋|机械社区 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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