Ключевые слова: air valve, background, blue, bolt, burst, company, connection, construction, drink, ductile, energy, engineering, equipment, filtration, fitting, gas, industrial, industry, infrastructure, iron, large, leak, line, main, metal, new, oil, pipe, pipeline, pipes, piping, plant, plumber, plumbing, pressure, pvc, repair, service, sewer, station, steel, supply, system, technology, transportation, tube, valve, water, wet, white,