37 Building construction; construction of public works, namely, roads, expressways, tunnels, ports, docks, dikes, canals, piers and bridges; construction of civil engineering structures, namely, airports, office or residence towers, finance or commercial centers, car parks, hotels, historic monuments, museums, oil drilling platforms, subway and railway lines, subway or railway stations, land reclaimed from the sea, hydroelectric power stations, thermal power stations, nuclear power stations; excavation of trenches or walls in the ground; construction services, namely, injection of preparations into the ground for consolidation and waterproofing of structural foundations; foundation contractor services; ground treatment and ground improvement services, namely, cement or chemical grouting, jet grouting services; installation of deep foundations; installation of earth retention and slope stabilization systems using rock and soil anchors