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fiogf49gjkf0d易切削钢：
9SMn28.15S20.35S20.15S20.SUM22.
SUM23.SUM43.1213.1215.1117.1135.1141.
1144.Y12.Y15.Y20.Y30.Y35.Y40Mn.Y100Pb.
合金结构钢：
20MnV.35CrMo.42CrMo.35CrMoV.20CrNiMo.
20CrNi.12CrNi2.12CrNi3.12Cr2Ni4.40CrNiMoA.9Mn2V.
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