... carbon steel, carbon steel, alloy steel, etc.; Advanced inverter technology: Inverter frequency up to 100KHz, conversion rate of 85%, no-load ... and economical and durable; Precise control system: PWM Pulse Width Modulator, closed loop control system to ensure the machine is ... good, little spatter, arc stability, weld pool easy to control, weld appearance, 200B with thrust adjustable function; Improve ...