... / IGBT inverter CO2 gas shielded welding machine and manual NB-270 ,NB-350, NB-500, NB-630CO2 gas shielded welding machine / IGBT inverter CO2 ... duty cycle60%Weight30kg40kg47kg58kgOverall package dimension(mm)670*400*610mm NB-270 ,NB-350, NB-500, NB-630 IGBT inverter CO2 gas shielded welding machine