... X 27Weightkg25,22728Inverter AC/DC Multi-functions MMA/TIG Welding Machine/Welder1.Characteristics1) Simple operation;2) Figures appearing, exactly review ... to connect robot and automatic production line 6) An advanced machine: staging of RS232, no tool, easy to use3.Application: ... TIG DC welding mode(connect with negative pole): non-alloy, end alloy steel, high alloy steel, nickel alloy, copper alloy ...