... all areas 3. high efficiency ZX7-200 DC Arc Inverter Welder DC Inverter WelderStable Arc, No-load Voltage is higherThe Power can ... from AC220V to AC110VMolten bath is easy to control, lightweigh Arc is hand inverter welder series which is made by international ... ) by MOSFET, then step down voltage and rectificate current, inverter arc welding pwer supply generates powerful DC welding current through PWM ...