4071| 16
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求經熱處理后有高耐磨性質的材料 |
點評
同感,似乎是粉末冶金一類的東東吧?
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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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