... (kg)4.7 Our welding machine model :-------ZX7 Series is inverter dc arc welding for iron and another metal.-------WS,TIG Series ... ,copper and other non-ferrous metals.-------WS/ZX7 Series is inverter dc argon arc and arc welding for iron and steel,copper ... and another low alloy components.-------CUT,CT,LGK Series is inverter dc plasma cutting for stainless steel,carbon steel,copper,aluminum and other ...