Ключевые слова: abstract, air, aluminium, architecture, bent, building, business, chimney, circle, conditioning, construction, curved, design, duct, engineering, equipment, exhaust, exterior, facade, factory, factory building, grey, grid, house, industrial building, industry, inspection, metal, pipe, pipeline, restaurant, round, safety, shadow, stainless, stainless steel, steel, street, technology, tube, urban, vent, vent pipe, ventilation, ventilation pipe, ventilation system, ventilation tube, wall,