Retorts, Crucibles, Mufflers, Nozzles, Plugs, Supports, Cupels, Tubes, Pipes, Sheaths, Rods And Other Refractory Ceramic Goods, Containing > 50% Alumina, Or A Compound Of Alumina And Silica (excl. Refractory Bricks, Blocks, Tiles And Similar Refractory Ceramic Constructional Goods)
Retorts, Crucibles, Mufflers, Nozzles, Plugs, Supports, Cupels, Tubes, Pipes, Sheaths, Rods And Other Refractory Ceramic Goods, Containing > 50% Alumina, Or A Compound Of Alumina And Silica