Ключевые слова: abstract, backdrop, background, banner, black, building, button, cable, chimneys, clean, column, economy, electric, electricity, engineering, evening, factory, fuel, horizon, horizontal, icon, illustration, industrial, industry, isolated, label, liquid, mainstay, mills, oil, pillar, plant, power, prop, refinerie, set, shadow, sign, silhouette, symbol, tower, urban, web, white, yellow,