Parts and elements, made wholly or partially of ceramic materials, namely, bushes, valve discs and foam filters for machines, used in chemical, food, textile, electro-technical and cellulose industries;ceramic filament guides for machines used in the textile industry; ceramic extrusion cores for machines used in the chemical industry, namely, in ceramics industry; ceramic machine parts, namely, cyclone separators and ceramic cones used in the paper and cellulose industries;welding machine parts, namely, ceramic inert gas welding nozzles, ceramic wire handling pulleys and ceramic guides used in the electro-technical industry; ceramic pistons and fluid seals for use with hydraulic and electric pumps and for internal combustion engines, not for land vehicles

Parts and elements, namely, crucibles, crucible lids, crucible covers, crucible stands and bases, melting dishes, annealing cups and annealing cup covers, roasting dishes and scorifiers, made wholly or partially of ceramic materials for scientific apparatus and instruments used in metallurgy, heat treatment of metals, in chemical industry, glass making, enamelling, dental and electric lamp making processes, all for laboratory testing use; furnaces for laboratory experiments, electrical controllers for furnaces; pyrometric sheaths, namely, refractory protective coverings for pyrometers; refractory tubes for combustion analysis

Parts and elements, namely, washers for water taps, ceramic foam filters for filtering of water, boiler tubes for heating installations, made wholly or partially of ceramic materials and used in apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, sanitary purposes and water supply; fittings and linings made of ceramic materials for nuclear reactors; ceramic linings and ceramic holders for kilns, ceramic heating tubes for heaters and kilns; ceramic chimney flues; crucibles and lids and covers therefore, foam filters for filtering of water, all made of ceramic materials for kilns and metal melting furnaces; oven fittings and linings made of fire clay; structural parts of metal melting furnaces and kilns, namely, riser tubes and fill tubes, all made of ceramic material; accessories and parts of metal melting furnaces and kilns, namely, foam filters for filtering of water, and nozzles for pouring of hot water, all made of ceramic material

Parts and fittings, namely, structural vehicle parts in the nature of valve discs not being engine parts, made wholly or partially of ceramic materials, meant for use in vehicles and apparatus for locomotion by land, air and water