Good performance MMA-250T DC inverter welder 1) inverter IGBT technology 2) duty cycle:100% 3) long time continue working Good performance MMA-250T DC inverter welder Use: light ... low carbon steel, carbon steel, alloy steel, etc.; Advanced inverter technology: Inverter frequency up to 100KHz, conversion rate of 85%, no- ... (MM)36*23.5*27535*285*385 Good performance MMA-250T DC inverter welder