... 4th, April to 6th, April. ISO9001 steel structure building (building contractors)Product specification:1)Steel frame system:Main frame: ... /Z section steel production linePunching machineBending machineSheet shearsTurning machineLine Model YX26-205-820 ,YX16-225-900, YX51-380- ... office buiding, factory , plant, exhibition hall, gym, dormitory building, bus station, gas station etc.The details of steel ...