Ключевые слова: background, black, blue, bolt, close, connect, connector, control, corrugated, distribution, energy, facility, factory, flow, gas, green, hydrant, hydrants, industrial, industry, installation, intake, iron, lines, machine, main, manifold, manufacturing, mechanics, metal, metallic, meter, open, pipe, pipes, plant, plumb, plumbing, pressure, pump, red, source, steel, system, taps, transportation, turn, twist, valve, water,