Ключевые слова: asphalt, bolt, broom, brush, business, chain, city, clean, cleaner, cleaning, cleanliness, cleanness, cleanup, closeup, conceptual, day, detail, dirt, dirty, dust, ecology, equipment, floor, garbage, industrial, industry, machine, machinery, mechanization, metal, modernization, movement, nobody, outdoors, part, progress, road, scene, sidewalk, street, sweeper, sweeping, technology, traditional, truck, urban, vehicle, wash, wheel, work,