[ Common metals and their alloys; buildings, transportable, of metal; pipes and tubes of metal; steel, unwrought or semi-wrought; aluminium; copper rings, namely, ring-shaped fittings of copper; screw rings of metal; angle irons of metal; lintels of metal; reinforcing materials, of metal, for concrete; reinforcing materials of metal for building; laths of metal; masts of metal; winding spools of metal, non-mechanical, for flexible hoses; platforms, prefabricated, of metal; wash down spray noz...