? Electric multi-leaf smoke vents apply: leafy exhaust port is usually installed on the aisle side walls of the room with no windows or exhaust system, usually normally closed. When the fire broke out, smoke detector send out alarm signals, the control center through DC24V power control mechanism to the exhaust port, exhaust port so quickly opened for smoke, remote control can also be opened manually, remote control manual reset. Wanda With a strong R & D capabilities and specialized manufacturing scale, based on changes in the market continues to continuous technological innovation and product innovation. At present, the production of smoke control systems, central air-conditioning system two series of products, product variety, complete specifications, covering all types of products, is currently the industry's most complete varieties and models of international manufacturers.