Pipes, tubes and hoses, and fittings therefor, including valves, of metal; valves of metal (other than machine parts) including those of steel, stainless steel, inox, aluminium; check valves of metal (other than parts of machines); metal valves for silos, storage tanks; structures and transportable buildings of metal; buildings of metal; construction platforms [structures] of metal; metal platforms; staircases of metal; handrails of metal; containers and articles for transport and packaging o...