Ключевые слова: background, bolt, business, construction, control, door, engineering, equipment, faucet, field, fire, fuel, gas, gasoline, graphics, head, hydrant, industri, industrial, industry, iron, isolated, isolation, line, natural, no, object, oil, pipe, pipeline, piping, plant, power, preparation, pump, red, resources, shape, steel, system, tool, transportation, valve, water, white, wide, work,