inverter AC/DC TIG welding machine centralized arc,both ac tig & dc tig solder aluminium and steel,any metal high duty cycle WSE-200 inverter square wave AC/DC TIG welding machine Advantages:Can welding aluminum, stainless steel and other alloy metals, both thick and thin plate, with beautiful arc shape and no deformation, use widely, pit one against ten.Get Star special features:centralized arc, ...