Ключевые слова: bucket, building, business, city, cleaner, cleaning, cloud, crystals, danger, downtown, employment, exterior, facade, glass, glossy, hanging, high, insurance, job, labor, maintain, maintenance, management, manual, manual worker, men, mirror, occupation, office, outdoor, person, polishing, pollution, profession, purity, reflection, risky, sky, skyscraper, soap, tall, tower, up, urban, vision, washer, water, window, wiper, worker,