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100 amperes acetylene Additional Passes amperage angle arc length arc welding base metal basic bead is completed bench bend test bevel bottom plate British Thermal Units burn butt weld cable carefully chapter clean the weld coated electrodes corner weld cover pass Crucible Steels deposit destructive tests elec electric arc electrode holder Figure filler metal fillet weld flat position forward motion fused groove heat hold the arc lessons look master melting and freezing molten metal move fast move the electrode oxy-acetylene torch pass is completed piece of steel pieces of plate Point the electrode practice Remember second bead second pass shown in Fig skill slightly smooth speed steel plate straight line strike an arc student tack temperature thick third bead third pass tion top plate trode type electrode vertical position weaving motion weld bead weld metal weld puddle welding machine Welds Overhead whip technique whipping motion