Ключевые слова: abstract, all, barrel, blue, body, circle, closeup, connected, construction, engineering, environment, equipment, factory, flowing, fossil, fuel, gas, gasoline, generation, group, industry, iron, large, liquid, machine, machinery, material, metal, natural, nature, oil, outdoors, pipe, pipeline, pipes, pollution, power, refinery, steel, storage, tank, technology, together, tube, valve, water, working,