40 Manufacturing of telecommunications machines and apparatus, electronic machinery and equipment and their parts, and optical equipment; Ceramic coating; Manufacturing and processing of ceramics for others; Ceramic processing; Surface treatment of metals, glass, ceramics, and plastics; Coating services for tools, for optical and electronic instruments and for parts of precision constructions; Cutting, polishing and coating of glass and other optical surfaces; Manufacture of optical equipment and their parts and accessories for others; Processing of optical equipment parts and materials