4629| 3
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鎳鉻鉬鋼(美國牌號是4340)表面硬化熱處理 |
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點評
。。。怎么會是不銹鋼?就因為有Cr?
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Archiver|手機版|小黑屋|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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