19 Non-metal building and construction materials, namely, building materials and construction elements of wood, wood substitute or plastic, namely, wood boards, wall boards, sheathing boards, parquet floor boards, particle boards, and raw and coated chip boards for the building industry, furniture and interior decorating, beams, wood window frames, wood door frames, and wood greenhouse frames, pressure-treated wood columns, composite panels consisting of a rigid expanded polystyrene core bonded to an outer skin of MDF (medium-density fiberboard) wood sheet, wood panels, doors, and floor boards all for trade fairs, exhibitions, shops and building interiors; non-metallic building materials, namely, nonmetal wall boards, nonmetal exterior boards, fiberglass boards, and gypsum boards, beams, window, door, and greenhouse frames not of metal, prefabricated nonmetal architectural columns, and nonmetal advertisement columns, nonmetal building panels, multilayer panels of plastic for use in building, composite panels composed primarily of nonmetal materials, fiberglass panels, nonmetal floor panels, nonmetal roofing panels, nonmetal door panels, nonmetal fence panels, and nonmetal ceiling panels, doors and floor boards; non-metallic transportable buildings