Melting furnaces for industrial purposes, electric furnaces for industrial purposes; heat processing equipment for use in the metal reduction and treatment industry, namely, shaft furnaces for the reduction of metal oxides and high temperature gas reforming units; industrial furnaces and their parts; nuclear reactors; atomic piles; furnaces for the production of melt metals, iron sponges and direct reduced iron; industrial furnaces for melting iron, steel and other metals, heating and treating steelmaking and other metal parts and burners to be installed in such furnaces; furnaces and equipment for heating, heat-treatment, calcination, direct reduction of products and materials for the metallurgical industry; furnaces, other than for laboratory use