Air-conditioning system installation and repair; Construction and construction management of tunnels and underground structures; Construction project management services in the field of construction of renewable energy and energy generation equipment support structures and ancillary structures for supporting meteorological data gathering equipment; Construction project management services in the field of residential and commercial buildings, factories; Building construction supervision services for building projects; Building construction supervision services relating to shopping centers, industrial complexes, office buildings, residential buildings and other real estate developments; Construction supervision; Construction management; Construction of structures for the storage of natural gas; Consulting services for the construction of water treatment and purification plants, solid waste treatment plants and other municipal infrastructure facilities; Installation and maintenance of fire alarm, detection and suppression systems; Installation and maintenance of irrigation systems; Installation and maintenance of solar energy based power plants; Installation and repair of air-conditioning systems; Installation and repair of heating, ventilating and air-conditioning systems; Installation and repair services for irrigation systems; Installation and replacement service for heating, ventilating and air conditioning systems; Installation of air-conditioning systems; Installation of heating, ventilation and air-conditioning systems; Installation of irrigation systems; Installation of security systems; Installation of utilities in construction sites; Installation of wiring and power supply equipment for transmission and distribution of electricity suitable for electric vehicle recharging stations; Installation, maintenance and repair of air-conditioning systems; Installation, maintenance and repair of solar installations for generating power; Installation, maintenance and repair of solar installations for generating power, solar collectors and photovoltaic modules; Installation, maintenance and repair of air analysis apparatus; Installation, maintenance and repair of cooling and air-conditioning systems for temperature-controlled environments; Installation, maintenance and repair of fire and security alarms; Installation, maintenance, and repair of outdoor automated mist systems for insect and pest control; Maintenance and repair of uninterruptible power supplies; Providing information relating to the repair or maintenance of power distribution or control machines and apparatus; Provision of information relating to the repair or maintenance of power distribution or control machines and apparatus; Repair and installation services, namely, the installation of heating, cooling and environmental control systems primarily using solar energy, renewable energy resources and rainwater; Repair and maintenance of uninterruptible power supplies; Repair of security locks; Repair of household appliances and of residential heating, plumbing, air conditioning, and electrical systems; Repair or maintenance of power distribution or control machines and apparatus; Repair or maintenance of integrated circuits manufacturing machines and systems; Technical consultation in the field of installation of lighting apparatus, lighting instruments and lighting systems; Technical consulting related to the installation of oil and gas equipment, control systems, and machinery