(Facades rain Grille, single outlet, double outlet, since the vertical blinds, shutters rain, swirl diffusers, diffuser), pressure delivery outlet, leafy exhaust port, smoke damper, exhaust smoke valves, fire dampers, check valves, control valves, ... 1, does not have the natural draft conditions stairwell, fire elevator room or shared room. 2, the use of natural smoke the stairwell, it does not have the front room of natural smoke. Qinhuangdao pressure delivery outlet. 3, closed refuge floors. Pressure delivery outlet offer. In all three cases were false set of mechanical pressurized air supply system. Its end is the pressure delivery outlet Here is style products and drawings. Pressure delivery outlet quotes, rich ventilation equipment (certified), Qinhuangdao pressure delivery outlet provided by the Dezhou rich ventilation plant. Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.