Ключевые слова: black, blue, business, china, cloud, construction, crude, dark, derrick, diesel, digging, drilling, economic, energy, engineering, equipment, evening, exploration, fuel, gas, gasoline, homework, industrial, industry, jack, labor, lights, machine, manufacturing, mechanical, metal, money, natural, night, oil, oilfield, oilwell, orange, petroleum, platform, power, process, production, pump, pumpjack, rig, rocking, silhouette, sky, steel, strength, sun, sunglow, sunrise, sunset, technology, tower, unit, wealth, works,