flash-welding

flash welding

noun
a method of welding metal edge-to-edge with a powerful electric flash followed by the application of pressure.
Also called flash butt welding.
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WordNet
flash welding

noun
butt welding by creating an electric arc between the two pieces which melts and joins them; used for joining segments of metal pipe 
WordNet® 3.0, © 2006 by Princeton University.
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