... , Z steel equipment, type 840,type 860, type 1050, type 1080, type 900, type 910, type 850, type 838, type 720, type 760, type 470, type 475, type 828, type 1100, C type steel, Z steel ... are: color equipment series ( type 820, type 840, type 850, type 860, type 900, type 910, type 1025, etc.). Angle Chi Series ( type 475, type 760, type 820, etc.). Double Caigang ...