3387| 9
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-15度环境下Q235焊接不需要预热,厚度20t以下的板焊接后不需要去应力? |
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小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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