ZX7-500 Mosfet DC inverter MMA welder 1,low price, energy saving. 2,mosfet ... design 3,Welding thickness:2.0-16.0 ZX7-500 Mosfet DC inverter ... MMA welder A.Feature and Application 1.Advanced Inverter technology and V-MOSFET ... your specific requirements F.Two stage quality control 1,Machine Adjustment, test the inner components to maintain ...