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Hi I'm Mike Rogers and we are making this video for expertvillage.com on the principles
of mig welding. Lets have a look in the machine itself. The whole idea of mig welder is that
you use a wheel of steel wire which is fed by a electric motor through this holes, up
to the top, and it is this wire that creates the weld that you are creating the steel with.
At the same time ..gas such as this shield goes straight through the machine, through
the cable, up to the torch, when you pull the trigger you get gas before you get fire.
This gas creates a strode around your whirlpool and prevents the world from oxy and give you
a good quality weld. Thank you.