Ключевые слова: architecture, background, blue, building, business, chemical, chimney, city, construction, design, electricity, energy, engineering, environment, equipment, exterior, factory, fuel, gas, grayscale, heavy, house, illustration, industrial, industry, iron, machine, manufacture, manufacturing, metal, oil, old, pipe, plant, pollution, power, production, sky, smoke, station, steel, storage, structure, technology, tower, urban, warehouse, white, work,