Ключевые слова: abstract, air, aluminum, architecture, blue, building, chimney, color, concepts, construction, cylinder, dark, design, environment, equipment, exhaust, exterior, factory, frame, horizontal, illustration, image, industrial, industry, iron, metal, new, night, nobody, outdoors, overcast, pipe, pollution, red, rust, science, shape, shiny, sky, steel, structure, surface, symbol, technology, three dimensional, tube, urban, wall,