ZX7-500 Mosfet DC inverter MMA welder 1,low price, energy saving. 2,mosfet ... 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 design.2.PWM control technology, current constant nd precise ...