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METAL HARDWARE COMPRISING FITTINGS, COUPLINGS, CONNECTORS, TUBES, TUBE LINES, HOSES, HOSE LINES, PIPES, PIPE LINES, FLANGES, SLEEVE COUPLINGS, NUTS, PIPE CLAMPS, CLAMPING, SECURING AND LOCKING BOWS, RINGS AND BOLTS, PIPE CONNECTORS, ELBOWS, FLANGES AND BRANCHES, SEALS, SEALING RINGS, SPRING RINGS, SUPPORTING RINGS AND PARTS AND FITTINGS THEREOF