37 Repair and cleaning of buildings, furniture, vehicles, and heating equipment; Air conditioning apparatus installation and repair, namely, installation and repair of equipment used for air treatment and distribution, fresh air intaking, and air filtering; Providing information on maintaining, repairing, washing and cleaning buildings, furniture, vehicles and heating equipment; Public works services, namely, construction of public roads; Construction grading services, namely, earth moving services; Construction and repair of buildings, edifices and warehouses; Construction services, namely, assembly of frameworks, metal bridges and foot-bridges, cladding panels, covers, and silos; Construction services, namely, assembly of scaffolding, hoppers, valves, dams, cofferdam carcasses, and apparatus for lifting and pithead frames; Rental of hand and power tools and equipment for construction, cleaning, and public works; rental of bulldozers, rental of construction equipment, rental of cleaning machines; rental of equipment for industrial and household cleaning, disinfection and insect pest control; exterior and interior cleaning, maintenance, and repair of edifices, buildings, offices, warehouses, factories, laboratories and industrial and commercial premises; Cleaning services, namely, mechanically removing scale and sludge from tubes in steam generators in nuclear power plants; Disinfection services; upkeep, namely, cleaning of buildings, commercial premises, floors, windows, walls and ceilings of commercial and industrial premises, tools, transport vehicles, wagons, trucks, semi-trailers, ships, aircraft and aircraft hangar areas; disinfection of vehicles, vehicle servicing and repair; Cleaning of dirty, polluted or contaminated parts of platforms, wagons, contaminated floors or walls by wiping smears and tearing off and sanding of dirty sections; Construction services, namely, construction of buildings and factories and dismantling of buildings and factories; Pest control services; Underwater working, namely, underwater construction and repairs, demolition of buildings; Rental of road sweeping machines; Installation, maintenance, and repair of cleaning machines and cleaning equipment; Installation and repair of devices used for irrigation, insect eradication, mosquito eradication, pest control, rat exterminating, and disinfecting; Pest control, namely, destruction of animals in installations