mma inverter,3 phrase,380v/415v,50-60hz,VRD,lift arc, Zx7 arc welding mma inverter mosfet 500AMPS 380VWith manual metal arc welding function Apply to acidic welding electrode, basic welding electrode, stainless steel welding electrode, heat-resistant steel welding electrode Good dynamic characteristics, little spatter and arc stability Easy to control molten pool, good welding appearance, good ...