worktops of ceramic, artificial stone, natural stone and foam; worktops for sinks of ceramic, artificial stone, natural stone and foam; worktops for bathroom sinks of ceramic, artificial stone, natural stone and foam; countertops of ceramic, artificial stone, natural stone and foam being structural component parts of furniture; work benches being furniture made of ceramic, artificial stone, natural stone and foam; work tops being work surfaces of ceramic, artificial stone, natural stone and f...