7
Current generators; Electrical generator stations; Hydroelectric installations for generating electricity
11
Sewage treatment [purification] installations; Biological reactors for clarifying industrial effluents; Industrial installations for filtering liquids; Sewage disposal plants; Sanitary installations, water supply and sanitation equipment; Water purification, desalination and conditioning installations; Industrial treatment installations
37
Hydro-electric factory construction; Installation of hydropower systems; Power infrastructure construction; Maintenance and repair of energy generating installations; Building, construction and demolition; Building maintenance and repair; Plumbing installation, maintenance and repair; Computer hardware and telecommunication apparatus installation, maintenance and repair; HVAC (Heating, ventilation and air conditioning) installation, maintenance and repair; Application of waterproof linings; Plant refurbishment; Application of protective coatings to tank surfaces; Excavating services for verifying the location of utility lines; Advisory services relating to the installation of power plants; Advisory services relating to the installation of generators; Advisory services relating to the installation of pumps; Replacement of accumulators; Advisory services relating to the repair of environmental control systems; Advisory services relating to the maintenance and repair of mechanical and electrical equipment; Advisory services relating to the installation of hydraulic equipment; Providing information relating to the repair or maintenance of pumps; Providing information relating to the repair or maintenance of power generators; Providing information relating to the repair or maintenance of water purifying apparatus; Electrical wiring services; Electrical installation services; Industrial cleaning services; Installation and maintenance of irrigation systems; Installation of electrical and generating machinery; Installation of geothermal installations; Installation of hydraulic equipment; Installation of rainwater collection systems; Installation of rainwater harvesting systems; Installation of rainwater tanks; Installation of water supply apparatus; Servicing of conduits; Construction of water supply installations; Repair of energy supply installations; Pump repair
42
Energy auditing; Programming of energy management software; Engineering services relating to energy supply systems; Technological consultancy in the fields of energy production and use; Development of energy and power management systems; Engineering services in the field of energy technology; Computer programming for the energy industry; Technological consulting services in the field of alternative energy generation; Research in the field of energy; Professional consultancy relating to the conservation of energy; Consultancy relating to technological services in the field of power and energy supply; Conducting research and technical project studies relating to the use of natural energy; Provision of information concerning research and technical project studies relating to the use of natural energy; Science and technology services; IT services; Testing, authentication and quality control; Technical project planning; Conducting technical project studies; Engineering project management services