Industry
Ceramic-metal (cermet) refractories, Glass, cement and ceramics, Minerals, Refractory materials, siliceous, 15 to 25% alumina, Refractory materials, 85 to 99% alumina, Refractory materials and their non-shaped products, Refractory cements, Grouts and mortars, refractory, Refractory materials, corundum, 85 to 99% alumina