8309| 20
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直径20左右的铜孔加工,光洁度要求0.2,请各位高手指点 |
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小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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