Retorts, crucibles, mufflers, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and other refractory ceramic goods, containing, by weight, < 45% of alumina and > 50% of silica (excl. refractory bricks, blocks, tiles)
Izdelki, ognjevarni, keramični, drugi, nad 50% glinice, do 45% aluminijevega oksida