Ключевые слова: autumn, block, boiler, central, circle, compressor, conduit, connection, crane, direction, energy, engineering, equipment, extraction, factory, fuel, fueling, gas, gas pipeline, grunge, human, industrial, industry, metal, oil, oil pipeline, old, picturesque, pipe, pipeline, plexus, plumbing, processing, propane, sewage, steel, storage, supply, system, technology, transportation, tube, turn on, utilities, valve, ventel, ventel closed, water, work, working pipes,