The steel fire door can be closed automatically and quietly by pushing it open with your hand, without any noise of collision, thus creating a quiet environment

https://ztfiredoor.com/25574.html

防火门价格,防火门出售,防火出口门，upvc紧急出口门,出口防火门，防火门出售,aluminium fire exit doors,pvc fire exit doors,upvc紧急出口门,glazed fire exit doors,防火门出售,fire exit glass door,upvc紧急出口门,fire exit door 3d warehouse,upvc紧急出口门,带窗的防火门，upvc紧急出口门,metal emergency exit doors