Ключевые слова: big, car, career, coal, construction, dig, digger, dirty, dump, earth, energy, environment, equipment, excavation, excavator, extraction, geology, gold, ground, heavy, huge, industrial, industry, iron, large, loader, machine, machinery, metal, mine, miner, mineral, mover, moving, open, ore, pit, power, production, quarry, rock, shovel, stone, transport, transportation, truck, vehicle, wheel, work, yellow,