Ключевые слова: background, building, car, city, clean, cleaner, dirty, engine, equipment, factory, floor, high, history, house, industrial, industry, iron, jet, luxury, machine, machinery, maintenance, man, metal, object, outdoor, people, plant, power, pressure, professional, railway, red, repair, service, station, steam, steel, technology, tool, train, transport, transportation, travel, truck, vehicle, wash, water, work, worker,