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  • Sign Builder Sticks with Adhesives
    , the plans called for thin sheets of aluminum to be mounted on a structural framework. The finished sign panels had to be lightweight and removable, as well as weather resistant. Typically, such sheets are welded to a structural backing. But welds distort the sheet metal, leaving divots on the surface

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  • ZASMHBA0005646
    The material may be partially fused or remain unfused during welding and may be either metal or nonmetal. backing bead A weld bead resulting from a backing pass. backing filler metal A nonstandard term for consumable insert. backing pass A weld pass …