General building construction; Installation, repair, cleaning, inspection and maintenance of chemical processing machines and apparatus, agricultural machines and implements, non-electric prime movers, other than land vehicles, pneumatic or hydraulic machines and instruments, Machine elements other than land vehicles, refuse compressors, Refuse crushers, Starters for motors and engines, alternating-current motors 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, Ozonisers-Ozonators, Electrolysers, Fire alarms, Gas alarms, Anti-theft warning apparatus, Measuring or testing machines and instruments, Power distribution or control machines and apparatus, Rotary converters, Phase modifiers, Batteries and cells, Electric or Magnetic meters and testers, Electric wires and cables, Electronic machines, apparatus and accessories thereof, Drying apparatus, Recuperators, Steamers, Evaporators, Distillers, Heat exchangers, Industrial furnaces, Nuclear reactors -Atomic piles, Industrial boilers, Air-conditioning apparatus, Refrigerating machines and apparatus, Waste water treatment tanks, Septic tanks, Garbage incinerators, Water-purifying machines and apparatus; Installation, repair, cleaning, inspection and maintenance of nuclear equipment; Installation, repair, inspection and maintenance of measuring machines and instruments and of detectors; Installation, repair, cleaning, inspection and maintenance of semiconductor manufacturing machines and apparatus; Installation, repair, cleaning, inspection and maintenance of incinerators; Installation, repair, cleaning, inspection and maintenance of gasifiers; Installation, repair, cleaning, inspection and maintenance of machines and apparatus for treating water, sewage water, industrial water, industrial waste water, night soil, refuse, household waste, industrial waste, industrial waste gases and heat and for manufacturing compost; Installation, repair, inspection and maintenance of refuse compressors and sewage soil crushers; Installation, repair, inspection and maintenance of waste-sewage-night soil treatment equipment and of composting machines and instruments; Installation, repair, inspection and maintenance of machines and apparatus for purifying water and sewage waters; Installation, repair, inspection and maintenance of gaseous melting system; Installation, repair, inspection and maintenance of melting furnace for sludge and of sludge treatment equipment; Installation, repair, inspection and maintenance of distilled water recovery equipment and ultrapure water system; Installation, repair, inspection and maintenance of electric demineralizers and continuous-electro deionization; Installation, repair, inspection and maintenance of machines and apparatus for excluding Nox, nitrogen-oxide and Sox, sulfa-oxide; Installation, operation, repair, cleaning, inspection and maintenance of pumps, vacuum pumps, compressors, pressure tanks, burners, boilers, freezers/freezing equipment, fans, blowers, turbines, heaters and air-conditioning apparatus; Installation, repair, inspection and maintenance of fluidized bed boiler; Installation, repair, cleaning, inspection and maintenance of water supplying machines automatically operated; Installation, operation, repair, cleaning, inspection and maintenance of refrigerating machines, such as centrifugal refrigerating machines, absorption refrigerating machines, gas direct fire heater chillers, oil fired absorption chiller/heater, heat pumps, chilling unites, fan coil unites, cooling towers, ice storage machines, instruments and system; Installation, repair, cleaning, inspection and maintenance of metalworking machines and machine tools, power polishers, chemical-mechanical polishing machines used in the manufacture of semi-conductors, surface polishers for semi-conductor wafers, semi-conductor wafer treatment machines and implements and machines for carrying the wafers, as well as components and accessories thereof; Electrical work construction and telecommunication work construction; Installation, repair, inspection and maintenance of electric control panels and control mechanisms for machines, engines and motors; Construction, installation, repair, inspection and maintenance of Telecommunication equipment and system; Construction, installation, repair, inspection and maintenance of system for controlling and monitoring pumps; Construction, installation, repair, inspection and maintenance of electrical information and transmission machines, apparatus and system for multimedia; Construction, installation, repair, inspection and maintenance of visual sensors for watching traffic; Construction, installation, repair, inspection and maintenance of controlling, monitoring and managing machines, apparatus and system; Construction, installation, repair, cleaning, inspection and maintenance of plating apparatus, namely, electric soldering apparatus, electric plating apparatus and electroless plating apparatus, bump plating apparatus, namely, plating machines for gold, solder or copper bump plating on circuit terminals on IC chips; Construction, installation, repair, cleaning, inspection and maintenance of automatic apparatus for analyzing solution composition in solder plating system, namely, solutions analyzers for solder plating on IC lead frames and for keeping each component density constant; Construction, installation, repair, cleaning, inspection and maintenance of automatic apparatus for treating draining in solder plating system, namely, water treatment machines for recovering pure water from waste water in solder plating lead frame cleaning/processing; Installation, repair, inspection and maintenance of computers, namely, central processing units, programmed data carrying electronic circuits or magnetic disks/magnetic tapes/magnetic cards, optical disks and other peripheral equipment; Installation, repair, cleaning, inspection and maintenance of plants; Installation, operation, repair, replacement work, cleaning, inspection and maintenance of equipment for supplying water to or draining water from buildings; Installation, repair, replacement work, cleaning, inspection and maintenance of water receptacles or water tanks in elevated positions; Installation, repair, inspection 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, inspection and maintenance of machines and implements, components and accessories thereof, for manufacturing of liquid crystal display for using electronic machines and implements; Manufacture, installation, repair, inspection and maintenance of solar batteries as well as components thereof; Manufacture, installation, repair, inspection and maintenance of fuel cell as well as components thereof; Installation, repair, inspection and maintenance of chemical reactors, used for attaching a vapor of a chemical material and deposition equipment, as well as components thereof; Installation, repair, inspection and maintenance of equipment used for processing wafers used for manufacturing semiconductors, as well as components thereof; Installation, repair, inspection and maintenance of epitaxial reactors, chemical deposition reactors, plasma etching process equipment, physical deposition reactors, ion injection equipment, and supporting frames therefor; Installation, repair, inspection and maintenance of containers for semiconductor wafers, and components thereof; Installation, repair, inspection and maintenance of measurement equipment for film thickness of semiconductor wafers, and components thereof; collection and separation of municipal waste; collection and separation of industrial waste

Custom design of plants, including machines and apparatus for treating water, sewage water, industrial water, industrial waste water, night soil, refuse, industrial waste, industrial waste gases and heat; Engineering services in the field of environmental hygienic facility system and water purifying apparatus and water contamination control equipment; Engineering services in the field of ultra pure water production system and various other environmental hygienic system; Engineering services in the field of cogeneration system and other electric power plants; Engineering services of the pump equipment, Engineering services of incinerators; Investigation, analysis, inspection, examination, research and information services for waste, fuel gas reproduced from waste, gas for generating electricity, other fuels, gas for chemical raw materials and other various chemical materials; Design of plan, investigation, examination, research, technological guidance, consultancy and information services in the field of regeneration, processing and treatment of waste; Design, drawing, engineering, examination, research, technological guidance, consultancy and information services of waste compression apparatus, waste crushing apparatus, waste processing apparatus, waste treatment apparatus and plant for regeneration, processing and treatment of the waste; Design of machines, apparatus and instruments, namely, components thereof and/or facilities composed by these machines, apparatus and instruments excluding design services of waste compression apparatus, waste crushing apparatus, waste processing apparatus, waste treatment apparatus and plant for regeneration, processing and treatment of the waste; Examination and research services of prevention of the pollution; Examination, inspection and research services of agriculture, livestock breeding and marine; Examination and research services of machines and instruments, excluding examination and research services of waste compression apparatus, waste crushing apparatus, waste processing apparatus, waste treatment apparatus and plant for regeneration, processing and treatment of the waste; Rental/leasing of measuring machines and instruments and of detectors; Rental/leasing of physical and chemical machines and instruments; Research services in the field of liquid, heat, energy, materials, vibration control, sound control, tribology, magnetic carrier shaft and magnetic application, system control, information technology, beam technology, biotechnology, pure water, ultra-pure water, sterilization water, water treatment, sludge treatment, harmful gas treatment and air purification; Measurement, analysis and investigation services of water quality, atmosphere, energy use, working environment; Measurement and analysis services of air pollution, water pollution, noise, and other environmental matters; Rental and/or leasing of driven machines and instruments, pneumatic or hydraulic machines and instruments, and refrigerating machines and instruments; Maintenance of computer software for electrical information and transmission apparatus for multimedia; Maintenance of computer software for controlling, monitoring and managing machines