37
Construction of renewable energy power plants, facilities and production systems; Construction of power plants, facilities and production systems; Repair of energy supply installations; Repair of energy production plants and machines; Construction of power stations, construction of energy facilities and Construction of energy production systems; Maintenance and repair of energy generating installations; Installation of wind power systems; Construction of geothermal energy installations; Construction of wave energy power plants; Installation of power generating apparatus; Maintenance and repair of solar power installations; Maintenance and repair of wave energy power plants; Installation of non-residential solar panel power systems; Installation of residential solar panel power systems; Repair or maintenance of power distribution or control machines and apparatus; Installation of solar powered systems; Installation and maintenance of photovoltaic installations; Construction of wind power plants; Maintenance and repair of wind power plants; Installation and maintenance of solar thermal installations; Maintenance and repair of solar thermal installations
40
Recycling services; Steel cutting; Metal pressing; Blacksmithing; Treating [forging] of metal; Shaping of metal components; Polishing of metals; Abrasion; Boilermaking; Metal plating; Construction of renewable energy production machines; Construction of energy production machines
42
Engineering in the field of renewable energy; Design and development of regenerative energy generation systems; Research in the field of energy; Technical advice in connection with energy-saving measures; Development of energy and power management systems; Design and development of energy distribution networks; Conducting research and technical project studies relating to the use of natural energy; Technological consulting services in the field of alternative energy generation; Technical consulting in the field of environmental engineering; Engineering project studies; Engineering services relating to energy supply systems; Technical project studies and research relating to renewable energies