19 Artificial stone; bricks; building materials of ceramic, concrete, carbon fiber plastics, aramid fibers and plastics, namely, building materials of ceramic, concrete, carbon fiber plastics, aramid fibers and plastics in the form of door panels, beams, pre-cast wall forms; building panels of ceramic, concrete, carbon fiber plastics and plastics, namely, door panels, roof panels, wall panels and floor panels; building stone; cement posts; cement slabs; concrete building elements, namely, concrete panels, concrete architectural columns for buildings, concrete beams, concrete blocks, concrete bricks and concrete panels; construction materials of ceramic, concrete, carbon fiber plastics, aramid fibers and plastics, namely, construction materials of ceramic, concrete, carbon fiber plastics, aramid fibers and plastics in the form of door panels, beams, pre-cast wall forms; door casings of carbon fiber plastics and plastics; door frames of carbon fiber plastics and plastics; door panels of carbon fiber plastics and plastics; fences of carbon fiber plastics and plastics; cement for furnaces; grout; palings of concrete, carbon fiber plastics and plastics; palisading of carbon fiber plastics and plastics; slag as building material, namely, slag stone, portland blast-furnace slag cement and slag-lime cement