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請問,表面淬火一般使用中碳鋼,正火或調制后,需要在表層滲碳么?需要滲碳是基于... |
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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