Ключевые слова: air blower, air drain, air duct, air ventilation, air ventilize, blower, blower duct, blower hood, drain, drain hood, environment, factory, factory blower, factory blower duct, factory blower hood, factory filter, filter, filter duct, hazard, hood, poison, poison drain, poison environment, poison filter, poisoning, poisoning drain, ventilate, ventilation, ventilator, ventilize,