Ключевые слова: activity, barcelona, borehole, boring, bulldozer, concrete, construction, construction site, crane, development, digging, dirt, dredger, drill pipe, drilling, earthworks, engineering, equipment, excavations, freeway, gravel, ground, highway, hydraulic, industry, investment, llobregat, machine, mover, power, process, road, roadworks, rotary drill, sant feliu, sant joan despi, soil, spain, structure, technology, tools, tracks, train, transportation, undergrounding, vehicle, working, workplace,