Steel Heavy Rail U71mn 43kg/M GB Hebei Iron & Steel Group Yong Yang Steel Co., Ltd. Base Info Standard：GBMaterial：Low Carbon SteelConnection：WeldingHeight：134mmHead Width：68mmWeb Thickness：13.3mmFoot Width：114mmHS Code：7302100000 Description Pre：Heavy Steel Rail U71Mn 43kg/M GB Next：Bimetallic Twin Screw and Barrels
