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50Mn18Cr5N这种材料在锻造的过程中要注意些什么 |
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小黑屋|手机版|Archiver|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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发表于 2009-8-19 08:00:43
发表于 2009-8-24 13:25:56