5547| 9
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1Cr17Ni2为什么不能被磁铁吸附 |
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点评
锯下个试块 ,打一下成分就知道 了
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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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