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求助,45鋼熱處理的問題! |
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點評
正火能叫調制?另外如果調制改善切削性,那正火干什么用的?
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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