| 摘要 |
A gas shielded arc welding torch with a working nozzle end including a nozzle seat having first a conically shaped outer surface decreasing towards the working end, a push on gas nozzle adapted to be received on the nozzle seat from the working end thereof and projecting beyond the working end thereof, the nozzle having an expandible section adapted to overlie the nozzle seat in tight engagement therewith, and constricting means resisting expansion of the nozzle.
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