37 General building construction; Installation, repair, cleaning, and maintenance of Chemical processing machines and apparatus, Ozonisers, ozonators, Electrolysers, electrolytic cells, Drying apparatus for chemical processing, Recuperators for chemical processing, Steamers for chemical processing, Evaporators for chemical processing, Distillers for chemical processing, Heat exchangers for chemical processing; Installation, repair, cleaning, and maintenance of Non-electric prime movers not for land vehicles; Installation, repair, cleaning, and maintenance of Pneumatic or hydraulic machines and instruments; Installation, repair, cleaning, and maintenance of Machine elements not for land vehicles; Installation, repair, cleaning, and maintenance of Waste compacting machines and apparatus, Waste crushing and shredding machine, and Garbage incinerators; Installation, repair, cleaning, and maintenance of Starters for motors and engines, Alternating and direct current motors not including those for land vehicles but including parts for any AC motors and DC motors, Alternating current generators, Direct current generators, Power distribution or control machines and instruments, Rotary converters, Phase modifiers; Installation, repair, cleaning, and maintenance of Fire alarms, Gas alarms, Anti-theft warning machines; Installation, repair, cleaning, and maintenance of Electric or magnetic meters and testers; Installation, repair, cleaning, and maintenance of Electric wires and cables; Installation, repair, cleaning, and maintenance of Electronic machines and apparatus and their parts; Installation, repair, cleaning, and maintenance of Industrial furnaces, Nuclear reactors; Installation, repair, cleaning, and maintenance of Industrial boilers; Installation, repair, cleaning, and maintenance of Air-conditioning apparatus for industrial purposes; Installation, repair, cleaning, and maintenance of Waste water treatment tanks for industrial purposes, Septic tanks for industrial purposes; Installation, repair, cleaning, and maintenance of Water purifying apparatus; Installation, repair, cleaning, and maintenance of Nuclear equipment; Installation, repair, cleaning, and maintenance of measuring machines and apparatus, testing machines and apparatus, and detectors; Installation, repair, cleaning, and maintenance of Semiconductor manufacturing machines and apparatus; Installation, repair, cleaning, and maintenance of Incinerators; Installation, repair, cleaning, and maintenance of Gasifiers; Installation, repair, cleaning, and maintenance of Machines and apparatus for treating water, sewerage water, industrial water, industrial waste water, night soil, refuse, household waste, industrial waste, industrial waste gases and heat for manufacturing compost; Installation, repair, and maintenance of Refuse compressors and sewage soil crushers; Installation, repair, and maintenance of waste sewage night soil treatment equipment and of composting machines and instruments; Installation, repair, and maintenance of Machines and apparatus for purifying water and sewage water; Installation, repair, and maintenance of Gaseous melting machines, equipment and system; Installation, repair, and maintenance of Melting furnace for sludge and of sludge treatment equipment; Installation, repair, and maintenance of Distilled water recovery equipment and ultra pure water system; Installation, repair, and maintenance of Electric demineralizers and continuous-electro deionization; Installation, repair, and maintenance of Fluidized bed boiler; Installation, repair, cleaning, and maintenance of Water supplying machines automatically operated; Installation, repair, cleaning, and maintenance of metalworking machines and machine tools, power polishers, chemical-mechanical polishing machines used in the manufacture of semi-conductors, surface polishers for semiconductor wafers, semi-conductor wafer treatment machines and implements and machines for carrying the wafers, as well as components and accessories thereof; Construction, installation, repair, and maintenance of telecommunication equipment and systems; Installation, repair, and maintenance of visual sensors for watching traffic; Construction, installation, repair, cleaning, and maintenance of Plating apparatus, Solder plating apparatus, Electric plating apparatus and Electroless plating apparatus, Bump plating apparatus; Construction, installation, repair, cleaning, and maintenance of Automatic apparatus for analyzing solution composition in solder plating system; Construction, installation, repair, cleaning, and maintenance of Automatic apparatus for treating draining in solder plating system; Installation, repair, and maintenance of computers including central processing units, programmed-data-carrying electronic circuits, magnetic disks, magnetic tapes, magnetic cards, optical disks and other peripheral equipment; Installation, operating, repair, replacement work, cleaning and maintenance of equipment for supplying water to or draining water from buildings; Installation, repair, replacement work, cleaning, and maintenance of water receptacles and water tanks in elevated positions; Installation, repair, and maintenance of machines and implements, components and accessories thereof, for processing, forming and manufacturing of thin films for using electronic machines and implements; Installation, repair, and maintenance of machines and implements, components and accessories thereof, for manufacturing of liquid crystal display for using electronic machines and implements; Installation, repair, and maintenance of solar batteries as well as components thereof; Installation, repair, and maintenance of fuel cell as well as components thereof; Installation, repair, and maintenance of chemical reactors, used for attaching a vapor of a chemical material and deposition equipment, as well as components thereof; Installation, repair, and maintenance of equipment used for processing wafers used for manufacturing semiconductors, as well as components thereof; Installation, repair, and maintenance of epitaxial reactors, chemical deposition reactors, plasma etching process equipment, physical deposition reactors, ion injection equipment, and supporting frames therefor; Installation, repair, and maintenance of containers for semiconductor wafers, and components thereof; Rental of prime movers in the nature of gas turbines; Rental of pneumatic and hydraulic machines and instruments in the nature of pneumatic and hydraulic construction equipment, namely, winches, gear boxes, and load systems