Ключевые слова: building activity, buildings, built structure, bulldozer, city, connection, construction, construction equipment, construction industry, construction machinery, construction site, day, daytime, development, digging, engineering, environment, equipment, excavate, excavation machine, excavator, germany, gray, heavy, hydraulic, hydraulics, industry, infrastructure, laboratory, lifting, machinery, maintenance, metal, no people, outdoors, place of work, poor, public, repair, safety, site, strength, structure, tools, trees, urban, work, workflow, working,