The steel fire door only needs to be pushed open by hand, and then it will be closed quietly and automatically, without the noise of knocking like opening the door inside and outside, and then create a quiet environment.

https://ztfiredoor.com/23405.html

fire exit locks for doors,elevator fire door,fire staircase door,emergency door lock for classrooms,vidin’ny varavarana vonjy maika,Garage door emergency,automatic sliding door emergency exit,fire door with lock,fire exit locks for doors,aluminium varavarana fidirana afo,garage door emergency,pvc fire exit doors,emergency door lock for classrooms,garage door emergency,varavarana afo tsy maintsy,fire exit locks for doors,disabled fire door,emergency door lock for classrooms,exit fire doors,fire exit door with window