Инерционная решетка Ostberg VK 250
Inerционные решетки VK are designed for automatic air duct closure to prevent air leakage in ventilation systems and to block exhaust openings when the fan is not running.
Inerционные решетки VK are designed for automatic air duct closure to prevent air leakage in ventilation systems and to block exhaust openings when the fan is not running.