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All Ordinary Straight Seam Fiberglass Misalignment Plug Square Groove Manhole Girth Weld Fillet Weld Double Bevel Groove Bulb Flat Round Bar Cross Joint T Joint Double V Groove Horizontal Position

All Carbon Steel Stainless Steel Aluminum Alloy

All Ordinary Flat Backing Fillet Weld Backing Double V Groove Backing (No Back Chipping) Ceramic Cylinder Girth Backing Iron Rail Backing SAW (FGB Backing) Fiberglass Backing Ceramic Ring Aluminum Tape