| 摘要 |
A welding gun nozzle including a first passageway through which welding wire may be fed into a weld and a second passageway through which shielding gas may be directed over the weld to protect the molten metal from contamination. The nozzle also includes a fume extracting passageway having an inlet orifice so located with respect to the outlet end of the nozzle that the fumes are drawn into the nozzle from a region laterally outward from the nozzle, and thus from an area removed from the weld, so the shielding gas is relatively unaffected by the operation of the fume extracting feature of the invention. |
