Steel fire doors are made of high-quality steel and filled with fire-resistant materials, and are always at the forefront of the industry. Some public places and large shopping malls use steel fire doors.

https://ztfiredoor.com/24706.html

external fire exit,fire door and fire exit,sliding door emergency exit,door alarm emergency exit,steel fire escape doors,emergency exit alarm,external fire exit,emergency exit door for commercial buildings,sliding door emergency exit,fire rated emergency exit doors,steel fire escape doors,industrial fire exit doors,external fire exit,exit only door,sliding door emergency exit,steel fire escape doors