Ключевые слова: blue, cloudy, connectors, construction, crude, derrick, diesel, drill, drilling, ecology, energy, equipment, exploration, facility, fuel, gas, gasoline, industrial, industry, machine, motor, nodding, oil, oil industry, oilfield, petroleum, pipeline, plant, platform, power, pump, pumping unit, refine, resources, rig, rocking, silhouette, sky, sun, sunset,