4032| 16
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求经热处理后有高耐磨性质的材料 |
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点评
同感,似乎是粉末冶金一类的东东吧?
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小黑屋|手机版|Archiver|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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