37 Construction, repair, maintenance, renovation, and installation services relating to building construction and infrastructures, namely, roads and bridges; construction services, namely, site clearing, grading and excavation work; refurbishment and repair of buildings; electric appliance installation and repair; construction planning; civil engineering construction, namely, construction of airports, roads, underground utilities and housing pads; excavation; building demolition; maintenance of water, gas and electricity distribution lines and networks; building construction supervision; construction project management; technical advice, construction consultancy and information relating to the to the aforementioned services, namely, the construction, repair, maintenance, renovation and installation of buildings, roads, bridges and underground utilities