scaffolding steel tube 1 High-frequency ... 0mm 4certificate:BV ,ISO,SGS ERW hot rolled scaffolding steel tubeAddition:1) Tread ends;2) Plain ends; ... according to the requirements of customersUsageMechanical&manufacture,Steel strcuture,Shipbuilding,Bridging,Automobile chassisMain marketMiddle East, ... ,Tianjin city , have extrem experience in steel manufacturing.Over the year's technical capabilities and ...