||Number of Company
||Manufacture of refractory ceramic construction products such as heat-insulating ceramic products and flameproof briquettes, blocks, bricks, refractory bricks, etc. from diatomaceous filtrated earth (diatomaceous earth)
||Manufacture of ceramic products such as refractory stills, distillation vessels, melting pots, valve tips, tubes, pipes, casting ladles, muffle furnaces, injection tubes, etc.
||Manufacture of refractory brick
||Manufacture of refractory cement, mortar and concrete.
||Manufacture of ceramic tiles and paving stones (including mosaic stones and mosaic cubes) (except refractory ones)
||Manufacturing of roofing tiles, chimney-pots, chimney-cowls, fireplace and chimney-flue, conduit, fittings, construction products such as tiles, of non-refractory clay and earth (incl.ceramic conduit,pipe and fittings)(excl.bricks, tiles)
||Manufacturing of non-refractory brick and tile in baked clay
||Manufacture of ceramic sanitary products
||Manufacture of ceramic insulators and insulating fittings
||Manufacture of other technical ceramic products (products used at laboratory, chemical and other technical fields) (except refractory ceramic products)