[ COMMON METALS AND THEIR ALLOYS; METAL BUILDING MATERIALS, NAMELY, TUBES AND CABLES FOR SEWAGE TREATMENT INSTALLATIONS, CHIMNEYS OF METAL, FRAMEWORK OF METAL FOR BUILDING, PROPS OF METAL; TRANSPORTABLE BUILDINGS OF METAL; MATERIALS OF METAL FOR RAILWAY TRACKS; NON-ELECTRIC CABLES AND WIRES OF COMMON METAL; PIPES AND TUBES OF METAL ]