1. IGBT DC PULSE TIG/MMA WELDING MACHINEIGBT module, high efficiency, high power utilization. 2. Pulse control and strong 1. IGBT DC PULSE TIG/MMA WELDING MACHINEIGBT module, high efficiency, high power utilization.2. Pulse control and strong welding permeability.3. Less splash, good welding surface, low noise. ITEMWSM-250WSM-315WSM-400WSM-500WSM-630Power voltage/frequencyThree phase380v±10% ...