Ключевые слова: background, building, connection, construction, control, drain, energy, engineering, equipment, factory, faucet, flow, gas, gasoline, hydrant, indian, industrial, industry, iron, line, machine, maintenance, man, metal, oil, pipe, pipeline, piping, plumber, plumbing, power, pressure, professional, pump, repair, safety, service, service repair, station, steel, supply, system, tap, technology, tube, valve, valves, wall, water, water pump,