The importance of fire door is immeasurable in controlling the spread of fire, isolating the fire, ensuring the safety of personnel and reducing property losses. UL fire doors are used in North America and even other countries and regions with recognized UL standards.

https://ztfiredoor.com/21237.html

AS door for fire exit,double door emergency exit,steel vault door,sliding door emergency exit,double panic door,double door fire exit,steel vault door,external fire escape doors,AS door for fire exit,commercial emergency exit doors,double panic door,steel vault door,commercial fire exit doors,AS door for fire exit,fire exit double,double panic door,