37 Building construction and demolition services; rental of tools, machinery, heavy equipment and equipment for building and energy generation, transmission, distribution, or storage installations, construction and demolition; installation, repair and maintenance of buildings, constructions, roads, car parks, oil and gas pipelines, canals, electrical and sanitary installations, ventilation systems, fire-prevention systems, sewers and water supply networks; energy and facilities and apparatus cleaning services; maintenance and repair of energy generating installations; maintenance, overhaul being renovation and repair of electric energy generating, transmission, distribution and storage apparatus and installations; installation of wind power systems; construction of geothermal energy installations; installation of electric light and power systems