37 Building construction; installation of prefabricated building elements, building structures and industrial sites; Construction services, namely, construction of buildings, construction of roads, construction of bridges, construction of masonry and portable walls and structures; construction of buildings; construction of public works in the nature of masonry walls, portable walls, roads, tunnels, bridges, canals, embankments, dams, reservoirs, silos, street gutters; construction of civil engineering structures, namely, masonry walls, portable walls, roads, tunnels, bridges, canals, embankments, dams, reservoirs, silos, street gutters; excavation and drilling of pilots, wells, trenches, trenches for walls, and tunnels; construction, repair, maintenance and demolition of buildings and civil engineering structures; construction, maintenance and repair of roads, tracks, runways, bridges, bridge abutments, stabilized land structures, earth stabilization structures by means of mechanical effect, earth stabilization devices, embankments, retaining walls, dikes, tunnels, gutters, enclosures, reservoirs, tanks, silos and historical monuments; earthworks in the nature of injection of preparations into the soil, in particular for the consolidation or sealing thereof, for building construction; installation of reinforcements or ties for strengthening the ground; construction and installation of cladding on building structures and retaining structures; earthmoving for building construction; clearing being construction services in the nature of site clearing; dredging; construction supervision; rental of construction equipment; providing construction information; providing repair information