Construction; construction of public works; construction work management (supervision); installation of temporary structures for outdoor events; assembly of formworks for civil engineering construction; repair or maintenance of construction machines and apparatus; supervision of buildings during construction; building repair work; land excavation; site preparation being construction services; paving services; sealing buildings; on-site construction supervision of civil engineering structures; rental of construction and building equipment; rental of construction machinery; consultancy relating to the supervision of the construction of buildings; construction of geothermal energy installations; installation of apparatus for production of electrical energy; installation of wind-power systems; installation of solar energy systems; maintenance, overhaul and repair of electrical energy production apparatus and installations; maintenance and repair of energy production installations; project supervision for construction of civil engineering structures.

Production of energy; consulting in connection with electrical energy generation; electrical energy generation; generation of electrical energy from renewable energy sources; waste treatment [transformation].

Technical advice in connection with energy-saving measures; technological analysis regarding third-party energy and electricity needs; energy auditing; consultancy concerning technological services in the field of power supply and electricity; development of energy and electricity management systems; design and development of renewable energy generation systems; design and development of energy distribution networks; research in the field of energy; advisory services relating to energy consumption; technological consultancy services in the field of alternative energy generation; civil engineering planning services; research and development services in the field of engineering; engineering; preparing plans with respect to construction; technical project studies; provision of information regarding research and technical project studies relating to the use of natural energy.