Installation, maintenance and repair of air-conditioning systems; Installation, maintenance and repair of automatic doors and gates; Installation, maintenance and repair of batteries and accumulators; Installation, maintenance and repair of building automation equipment; Installation, maintenance and repair of chassis parts and bodies for vehicles; Installation, maintenance and repair of cleaning machines; Installation, maintenance and repair of computer hardware and peripherals; Installation, maintenance and repair of fire and security alarms; Installation, maintenance and repair of gas supply apparatus; Installation, maintenance and repair of heating systems; Installation, maintenance and repair of lighting apparatus; Installation, maintenance and repair of machinery; Installation, maintenance and repair of machines; Installation, maintenance and repair of measuring apparatus; Installation, maintenance and repair of power generating apparatus; Installation, maintenance and repair of railroad tracks; Installation, maintenance and repair of remote control apparatus; Installation, maintenance and repair of solar energy systems; Installation, maintenance and repair of telecommunications equipment; Installation, maintenance and repair of ventilating systems; Installation, maintenance and repair of industrial machinery; Installation, repair and maintenance of condensing apparatus, steam condensers, radiators for motors and engines, air reheaters, boiler tubes
Building Construction and Repair