供应1214，Y12，Y40Mn易切削钢
易削切钢SUM11SUM12SUM21SUM22SUM23SUM25SUM31SUM32SUM22LSUN23LSUM24LSUM31L11101109121212131215111712L14113511449***n28.15S20.35S20.M22Y12.Y15.Y15Pb.Y20.Y30.Y40Mn.Y100Pb.Y100Bi.易切削不锈钢：303.303Cu.316F.416.420F.430F.430FR.440F.)