Unwrought or semi-wrought iron; unwrought or semi-wrought iron alloy; unwrought or semi-wrought steel; steel in sheet, pipe, tube, plate, bar, billet, bloom, slab and rail form; nonferrous common metals and their alloys, unwrought or semi-wrought; ores of metal; building and construction materials of metal; valves of metal, other than parts of machines; junctions and joints of metal for pipes; flanges of metal; nails, pegs, washers, nuts, screws, plugs, bolts, and rivets, all made of metal.;
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