IGBT Inverter DC ARC Welding Machine:MMA welder Easy to initiate arc, stable arc, with digital current show, protection design. IGBT Inverter DC ARC Welding Machine:MMA welderModel No:ZX7-400sTechnical parametersZX7 ... Machine for 8 years. With strong technology & development capacity, our product range covers inverter MMA, TIG, MIG/MAG, PULSE TIG, AC/DC TIG, PLASMA CUTTING series. And ...