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wwjxgz 发表于 2013-1-10 09:52 static/image/common/back.gif( Z. Z9 u, y# }* N9 P* O8 N 60Si2MnA或者50CrVA,市场上很容易采购到的。
jin70 发表于 2013-1-13 09:35 http://www.3dportal.cn/discuz/static/image/common/back.gif , ^* B: F5 R1 k2 v- w8 D% e6 }可以试试65Mn
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