MIG/MAG welding machine is a metal arc welding equipment in a protective environment (Argon gas – MIG welding; CO2 gas – MAG welding); also known as wire welding machine, CO2 welding machine. MIG/MAG welding machines are commonly used when welding alloy steels and non-ferrous metals. The outstanding feature of the MIG/MAG welding machine is that the welding speed is 2-3 times higher than that of a manual arc welder, sometimes called a semi-automatic welding machine.