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试制定板厚为20mm，接头为对接接头的16MnR钢的埋弧焊工艺。 |
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 2012-12-19 18:31:04