... ChinaObtain patent, patent number:ZL 2008 2 0076183.5(Double-pulsed GMAW)ZL 2008 1 0054660.2(Multiple functions ... carcass, machineshop truck car hopper, Electron production facility, conveyer belt component, Office billboard, Office clamp, aluminum alloy window frame, automobile ... arc spot welding, GMAW(CO2/MIG/MAG), pulsed-GMAW, double-pulsed GMAW, arc carbon gas cutting welder and contain welding ...