37 Repair or maintenance of drones; repair or maintenance of industrial unmanned helicopters; repair or maintenance of helicopters; repair or maintenance of aircrafts; vehicle maintenance; drone-aided repair or maintenance of elevators; repair or maintenance of elevators; drone-aided repair or maintenance of loading-unloading machines and apparatus; repair or maintenance of loading-unloading machines and apparatus; drone-aided repair or maintenance of air-conditioning equipment; repair or maintenance of air-conditioning equipment; drone-aided repair or maintenance of gas lines; repair or maintenance of gas lines; drone-aided repair or maintenance of water supply and drainage pipes; repair or maintenance of water supply and drainage pipes; plumbing repair advisory services; plumbing maintenance advisory services; drone-aided repair or maintenance of plumbing equipment; repair or maintenance of plumbing equipment; repair or maintenance of telecommunication machines and apparatus for remote systems; repair or maintenance of satellite-aided location tracking devices; repair or maintenance of telecommunication machines and apparatus; drone-aided repair or maintenance of chemical plants; drone-aided repair or maintenance of hydroelectric, thermal, wind and nuclear power plants; repair or maintenance of hydroelectric, thermal, wind and nuclear power plants; drone-aided repair or maintenance of power lines; repair or maintenance of power lines; drone-aided repair or maintenance of electric wires and cables; repair or maintenance of electric wires and cables; drone-aided repair or maintenance of railway tracks; repair or maintenance of railway tracks; drone-aided repair or maintenance of buildings; building maintenance and repair; construction; road maintenance and repair; maintenance and repair of bridges, tunnels and other civil structures; drone-aided maintenance of building equipment, namely, electrical equipment, air conditioning equipment, water supply and drainage equipment and fire extinguishing equipment; drone-aided repair or maintenance of air conditioning equipment, water supply and drainage equipment; repair or maintenance of electrical equipment, air conditioning equipment, water supply and drainage equipment, and fire extinguishing equipment in buildings; mining extraction; repair or maintenance of solar power generation apparatus and solar panels; repair and maintenance of solar power generation apparatus and solar panels; maintenance of solar power generation apparatus and solar panels; vermin exterminating by drone-aided patrol, other than for agriculture, aquaculture, horticulture and forestry; pest control services by drone-aided patrol, other than for agriculture, aquaculture, horticulture and forestry.