Ключевые слова: air, blower, boiler, cooling, distribution, duct, ductwork, engineering, equipment, exhaust, factory, flow, furnace, heat, heating, hvac, incinerator, industrial, industry, insulation, line, makeup, manufacturing, outlet, oxidizer, oxygen, pipe, pipeline, piping, plant, power, repair, supply, system, thermal, throx, tube, vent, ventilation,