... gate, smelting rare metals, special alloys, ceramics, iron-smelting furnace of the lining (walls and tubes); physical and chemical containers ... molds, such as the Roberts mold, extrusion die nozzle pencil lead, etc.; do tool, die grinding, bullet-proof material, the ... products, widely used in a variety of high-temperature kiln furnace walls and roof, both high temperature-resistantance and heat- ...