... minimum spatter, even small current welding, is not so easy in arc welding and bonding undesirable phenomenon.Grid ... W, as compared with conventional welding machine, to save electricity by 50%. Welding low carbon steel, high- ... strength steel and Cr-Mo steel, copper, titanium, etc. almost all black metal, weld ... 320×670 IGBT Inverter DC arc welding machine(ZX7 series)