37 [ Building construction services; construction of buildings, bridges, roadways, pipelines, transmission lines, dams, harbours, refineries, power stations, substations, railways, pumping stations, water treatment plants, water waste treatment plants, telecommunication installations, factories, beneath ground construction work; plumbing services; utility services, namely, providing water and sewer services; installation of electrical wiring; advisory services related to construction, namely, technical advice related to the repair of buildings, bridges, roadways, pipelines, transmission lines, dams, harbours, refineries, power stations, substations, railways, pumping stations, water treatment plants, water waste treatment plants, telecommunication installations, factories; maintenance of vehicles and apparatus for locomotion by land; maintenance of industrial facilities, namely, industrial buildings; installation and maintenance of electronic security apparatus; maintenance of power generators and power distribution machines and apparatus; installation and maintenance of electric lighting apparatus; installation and maintenance of traffic equipment and systems; construction, installation and maintenance of ventilation systems; lift and elevator maintenance services; installation and maintenance of air-conditioning systems; installation and maintenance of railway signalling and controls; installation, maintenance and repair of computer hardware; building construction project management services for mining extraction services, construction and maintenance of railways, and for IT hardware installation ]