Ключевые слова: air, air ducts, architecture, background, blue, bright, brown, building, chrome, city, closeup, conditioning, construction, control, decorative, diode, duct, facade, factory, heat, hood, house, industrial, industry, iron, metal, metallic, modern, outdoor, pipe, plant, roof, rostovondon, russia, silver, sky, stainless, steel, structure, style, system, tape, technological, technology, tube, urban, valve, vent pipes, ventilation, wall,