Ключевые слова: action, adjustable, asphalt, automobile, brushes, business, city, cleaning, cleanness, cleans, cleanup, compact, controllable, copy space, dust, environment, equipment, footway, garbage, hydraulically, industrial, industry, machinery, mechanical, motorized, municipal, nimble, powered, purity, residential area, road, routine, rubbish, sanitation, service, street, sweeper car, sweeping, tidy, transportation, trash, truck, two independently, urban, van, vehicle, vertical image, waste, way, working,