Electrical installation services, namely, electrical installation of electrical wiring, outlets, light fixtures, and electrical panels; telecommunication wiring; plumbing; machinery installation; steel structure construction works; building construction services of water supply facilities; road paving, paving contractor services, and construction services, namely, concrete paving and asphalt paving services; painting; upholstering; instrumentation works, namely, installation, maintenance and repair of machines and instruments for controlling electrical, heating, ventilation, and air conditioning systems in buildings; construction and maintenance services relating to civil engineering, namely, concrete paving, site clearing, excavation, pad preparation, grading, and asphalt paving; general building construction works; scaffolding repair and scaffolding erection; construction services in the nature of earthworks; construction services using concrete; wrecking services; firefighting facilities construction; installation of electrical wiring; installation of overhead transmission line; construction and installation of overhead transmission lines; relocation and re-installation of overhead transmission lines; construction of incidental facilities of power transmission and distribution lines; installation of poles for illumination lamp and poles for electric lines; construction of energy generating installations, namely, solar installations, geothermal installations, and wind turbine installations; construction of power transmission and distribution lines; construction of underground utilities, namely, electric wires; laying of underground buried pipe; plant facilities construction; construction of lightning arrester facilities; installation of power distribution or control machines and apparatus; installation of batteries; installation of electric energy measuring instruments equipped with display function of integral power consumption, integral electrification time and integral electricity charges; installation of electric or magnetic meters and testers; construction of power plants; installation of air-conditioning systems; installation of hot water supply apparatus; installation of communication apparatus and instruments and computer equipment; cable burying construction; installation of electrical equipment and electric appliances; construction of telecommunications facilities; construction of incidental facilities of electric wires and cables; installation of solar energy facilities; construction consultation; construction consultancy; repair or maintenance of cinematographic machines and apparatus; repair or maintenance of optical machines and instruments; repair or maintenance of photographic machines and apparatus; repair or maintenance of loading-unloading machines and apparatus; repair or maintenance of fire alarms; repair or maintenance of office machines and apparatus; repair or maintenance of air conditioners for industrial purposes; burner maintenance or repair; repair or maintenance of boilers; pump repair or maintenance; repair or maintenance of freezing machines and apparatus for industrial purposes; repair or maintenance of electronic machines and apparatus; repair or maintenance of telecommunication machines and apparatus; repair or maintenance of construction machines and apparatus; repair or maintenance of consumer electrical appliances; repair or maintenance of electric lighting apparatus; repair or maintenance of electric motors; repair or maintenance of power distribution or control machines and apparatus; repair or maintenance of power generators; repair or maintenance of laboratory apparatus and instruments; repair or maintenance of measuring and testing machines and instruments; repair or maintenance of medical machines and apparatus; repair or maintenance of printing or bookbinding machines and apparatus; repair or maintenance of chemical processing machines and apparatus; repair or maintenance of glassware manufacturing machines and apparatus; repair or maintenance of fishing machines and instruments; repair or maintenance of metalworking machines and tools; repair or maintenance of machines and instruments for making shoes; repair or maintenance of industrial furnaces; repair or maintenance of mining machines and apparatus; repair or maintenance of machines and apparatus for manufacturing rubber goods; repair or maintenance of machines and systems for manufacturing integrated circuits; repair or maintenance of semi-conductor manufacturing machines and systems; repair or maintenance of machines and apparatus for processing food or beverages; repair or maintenance of machines and apparatus for lumbering, woodworking, or veneer or plywood making; repair or maintenance of textile machines and apparatus; repair or maintenance of tobacco processing machines; repair or maintenance of painting machines and apparatus; repair or maintenance of agricultural machines and implements; repair or maintenance of machines and apparatus for paper-working; repair or maintenance of plastic processing machines and apparatus; repair or maintenance of packing or wrapping machines and apparatus; repair or maintenance of sewing machines; repair or maintenance of storage tanks; repair or maintenance of gasoline station equipment; repair or maintenance of mechanical parking systems; repair or maintenance of bicycle parking apparatus; repair or maintenance of cooking apparatus for industrial purposes; repair or maintenance of industrial dishwashing machines; repair or maintenance of industrial washing machines; repair or maintenance of vehicle washing installations; repair or maintenance of vending machines; repair or maintenance of power-driven floor cleaning machines; repair or maintenance of amusement machines and apparatus; repair or maintenance of machines and apparatus for use in beauty salons or barbers' shops; repair or maintenance of water pollution control equipment; repair or maintenance of water purifying apparatus for industrial purposes; repair or maintenance of waste compacting machines and apparatus for industrial purposes; repair or maintenance of waste crushing machines for industrial purposes; repair or maintenance of diving machines and apparatus; repair or maintenance of chemical plants; repair or maintenance of nuclear power plants; repair and maintenance of 3D printers; repair and maintenance of household electrothermic appliances; repair and maintenance of household electric water heaters; repair and maintenance of emergency power supplies; repair and maintenance of power receiving facilities and transformer facilities; repair and maintenance of hydroelectric and thermal power plants; repair and maintenance of machine installation in steel plants or power plants; maintenance of energy installation; repair, maintenance and inspection of power transmission and distribution facilities; repair, maintenance and inspection of electric wires and cables; rental of construction machines and apparatus; rental of equipment for constructions and buildings; rental of building materials and construction tools; rental of cleaning machines; rental of machines and apparatus for painting

Design of electrical installation works, plumbing and telecommunication wiring; design of electric wire common duct; urban planning for undergrounding of electric wires; design of electric wires, cables and cable tunnels for undergrounding of electric wires; architectural design; surveying; geological research; designing of machines, apparatus, instruments including their parts or systems composed of such machines, apparatus and instruments; consultancy in the design and development of computer hardware; designing websites for others; industrial design services; industrial product design services; graphic design services; design of interior decor; computer software design, computer programming, or maintenance of computer software; monitoring of computer systems by remote access to ensure proper functioning; computer system design; advisory services relating to computer software; technological advice relating to computers, automobiles and industrial machines; research on building construction or city planning; testing or research on prevention of pollution; testing or research on electricity; testing or research on civil engineering; testing, inspection or research of pharmaceuticals, cosmetics or foodstuffs; testing, inspection or research on agriculture, livestock breeding or fisheries; testing the functionality and research on machines, apparatus and instruments; calibration of machines; providing on-line non-downloadable software for use in database management for use on data networks; providing on-line non-downloadable software for use in monitoring of computer systems for security purposes for use on data networks; providing on-line, non-downloadable software for use in monitoring, operating, controlling, managing, acquiring data, reporting, and providing automation services for facilities heating, ventilation, air conditioning, lighting, energy use, and power management for use on data networks; providing on-line non-downloadable software for use in managing, monitoring, protecting, authenticating, and securing data, emails, computer systems, computer networks, servers, the Internet, and mobile devices for use on data networks; rental of computers; cloud computing featuring software for use in database management ; cloud computing featuring software for use in monitoring of computer systems for security purposes; cloud computing featuring software for use in monitoring, operating, controlling, managing, acquiring data, reporting, and providing automation services for facilities heating, ventilation, air conditioning, lighting, energy use, and power management; cloud computing featuring software for use in managing, monitoring, protecting, authenticating, and securing data, emails, computer systems, computer networks, servers, the Internet, and mobile devices; engineering; engineering services relating to energy supply systems; design and development of energy distribution networks; design of energy-saving instruments or apparatus; design and development of photovoltaic systems; technical consulting relating to reduction of electricity usage charge, safe use of electric power, low-power facilities and conservation of electric energy; consultancy in the field of energy-saving; research, analysis, diagnosis and guidance in the field of environment, and providing information thereof; measurement, evaluation and analysis of energy consumption; consulting services in the fields of energy measurement to improve energy efficiency; rental of measuring apparatus