Welding Basics : Techniques for Tig, Mig & Arc Welds : What is Tig Welding?

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Learn what tig welding is from an expert in arc, tig and mig welding in this free DIY video. Expert: Malcolm MacDonald Bio: Malcolm MacDonald graduated from Connestoga College in 1968 from the Fitter Welding Program. He currently teaches a welding apprenticeship program. Filmmaker: Melissa Schenk