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马氏体不锈钢最低热膨胀系数是6.5,有没有热膨胀系数比它低的金属材料 |
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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