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精密铸造的45钢零件跟锻造的45钢件,进行同样的热处理后,机械性能差别多大? |
Archiver|手机版|小黑屋|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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