1. light rail size: 6kg/m, 8kg/m, 12kg/m,15kg/m, 18kg/m, 22kg/m, 24kg/m, 30kg/m material: Q235B 55Q2.heavy rail size: 38kg/m, 43kg/m, 50kg/m,60kg/m material: U71Mn 50Mn3.crane size: QU70, QU80, QU100, QV120 material: U71Mn4.Japan korea...
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