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Levels "B" and "A" contain training in advanced S.M.A.W. (Shielded Metal Arc Welding), G.M.A.W. (Gas Metal Arc Welding), F.C.A.W. (Flux Cored Arc Welding) and G.T.A.W. (Gas Tungsten Arc Welding) plus related knowledge in Advanced Metallurgy and Advanced Blueprint Reading.