Pupil differences increase non-ferrous metals.

TIG welding is often referred to as TIG welding is a non-consumable electrode and the work piece between the heat-generating arc welding, the electrode rod, molten pool, the arc and working materials are made near the heated zone gaseous state this protection is protection from the atmosphere is mixed into the gas or gas mixture supply is usually an inert gas stream must be able to provide full protection because even a very small amount of air mixed also contaminate the weld.

Tungsten inert gas welding or called gas tungsten arc welding is a kind of non-melting tungsten electrode welding arc welding method.

After power on, through the current heating tungsten wire, tungsten is heating wire.