Ключевые слова: aeration, air, airing, appliance, building, conduit, duct, ductwork, engineering, equipment, factory, indoors, industrial, industry, line, manufactory, manufacture, manufacturing, metal, nobody, object, pipe, pipeline, piping, plant, production, room, shop, steel, supply, system, technology, tube, ventiduct, ventilate, ventilation, venting, workshop,