19 Semi-worked wood and artificial wood, namely, wood siding, hardboard, melamine faced panels, veneered panels, wood panels and components for furnishing sector and furniture sector in particular made of HDF wood, MDF wood, LDF wood, composite wood, plywood; wooden decking boards; boards made of wood particles; plywood board; softwood decking boards; roofing boards of wood; hardwood decking boards; building materials, namely, work surfaces not of metal for subsequent installation; ceilings, not of metal; ceiling boards of wood; ceiling boards, not of metal; non-metallic cladding for ceilings; ceiling coffers of non-metallic materials; non-metal suspended ceiling systems comprising panels; multilayer panels of plastic for use in building; facing panels of plywood; building boards of plastics materials; polyethylene panels used in furnishing sector and furniture sector