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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