Ключевые слова: big, bulldozer, car, coal, construction, copper, dirt, dump, dust, earth, energy, environment, equipment, excavate, excavation, extreme, filling, gear, glade, gold, ground, growth, heavy, highway, hydraulic, industry, iron, land, lane, level, machine, machinery, metal, mine, mineral, open, ore, pit, power, quarry, rock, silver, sky, soil, stone, terrace, transport, transportation, truck, vehicle,