Electric Fire Damper 70℃/280℃ Normally Ope...
Product Description Electric Fire Damper 70℃/280℃ Normally Open Fire 3C Fire Damper Galvanized Regulating Valve Smoke Exhaust 70℃ fire damper: 主要安装在通风、空调系统的送风、回风管道上. 正常情况下, the valve is in the open state to ensure the normal operation of the ventilation and air…



























