Forged rolls for steel rolling mill Supply all kinds of Mill Rolls 1,Material GB 45,Q345B,16Mn,42CrMo, 40CrNiMo, 20CrNiMo EN C45, S355J2G3, 16MnCr5, 42CrMo4, 39NiCrMo3, 18NiCrMo5, 55NiCrMoV7 ASTM 1018...
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