Ключевые слова: backgrounds, business, commerce, communication, construction, crane, economy, energy, engineer, engineering, equipment, factory, industrial, industry, light, logistic, maintenance, manufacture, mechanic, metal, morning, natural, nature, night, oil, panel, people, petrochemical, petroleum, pipeline, plant, pollution, power, production, professional, protection, refinery, services, silhouette, site, sky, stack, steam, steel, structure, sunset, technology, tower, twilight, worker,