Equipped with suitable welding electrodes, it can weld all kinds of on-ferrous metal such as the copper, the aluminum, the silver and the tungsten and various shapes of components such as stainless steel and coat-plated steel. Firm welding spot and nice looking. It is widely used in the welding for all kinds of components of the sophisticated instrument such as the household electrical appliances, the electronic appliances, the electrical instruments, the daily-use necessities and the transport means.