Custom manufacture of the following goods: industrial minerals, chemical substances, materials and preparations, and natural resources, unprocessed plastics, refractory materials of thermosetting plastic, putty, fillings and pastes for industrial purposes, synthetic compositions for forming coatings of borosilicate glass; custom manufacture of the following goods: refractory adhesives, bauxite, magnetic ferroalloys, spinel (oxide mineral), foundry sand and silicon carbide for use as a raw mat...