... and other metals. WS-160, WS-200, WS-250, WS-315, WS-400, WS-500 Manuel and argon welding machine1Advanced inverter technology, a machine ... for TIG and manual metal arc weldi2 ... High-frequency booster arc, easy arc starting, welding current stability, fast dynamic response, low ... /min WS-400 Manuel and argon welding machine