ALLOYS OF COMMON METAL, NAMELY, STEEL, IRON, BEARING STEEL, REINFORCING STEEL; METAL CONSTRUCTION MATERIALS AND STRUCTURES, NAMELY, FORMED SECTION FROM HOT-ROLLED ORDINARY BILLETS, HOT-ROLLED LOW-ALLOY BILLETS; HOT-ROLLED STRUCTURAL BILLETS, WELDED CLOSED SECTIONS FROM ORDINARY BILLETS, WELDED CLOSED SECTIONS FROM LOW-ALLOY BILLETS; SHAPED ZINC-COATED FLOORING; SHAPED FERROUS FLOORING; PIPES, NAMELY, WELDED PIPES, WATER AND GAS SUPPLY PIPES; GOODS OF COMMON METALS, NAMELY, HOT-ROLLED STOCK; H...