Ключевые слова: business, china, closeup, control, crude, derrick, drilling, energy, engineer, engineering, equipment, exploration, field, fuel, gasoline, hand sign, helmets, industrial, industry, job, laptop, metal, notebook, oil, one person, outdoors, pen, person, pipeline, power, profession, pumpjack, records, silhouette, sky, statistics, sunset, technology, worker, writing,