Subcontracted; on-site Subcontracted; on-site (W.F.O.W) (F.C.A.W) (S.A.W) (S.M.A.W-stick) Manual Method (G.T.A.W-tig/heliarc) Manual and Automatic Method (G.M.A.W-mig; short circuiting arc type) Semi-automatic and machine methods Subcontracted; on-site Subcontracted; on-site Subcontracted; on-site Limited to Thickness Determination