Ключевые слова: back, barrel, bird, black, business, commercial, construction, crane, currency, derrick, drill, drilling, energy, engine, environment, environmental, equipment, exploration, fuel, gas, gasoline, generation, helicopter, industry, large, light, machine, natural, occupation, ocean, oil, petrol, pipe, pipeline, plant, platform, pollution, power, pump, resource, rig, shadow, silhouette, supply, technology, tower, water, working,