1 Professional technology 2 High-quality, competitive price 3 high strength,corrosion resistance 4 OEM Brown corundum 1.it poured with steel sliding gate, smelting rare metals, special alloys, ceramics, iron-smelting furnace of the lining (walls and tubes); physical and chemical containers , spark plugs, heat-resistant anti-oxidation coating 2. Due to high hardness, wear resistance, high strength ...