Fire doors are divided into normally closed fire doors and normally open fire doors. The normally closed fire door is closed under the effect of door closer; Therefore, when a fire breaks out, it can prevent the spread of fire smoke.

https://ztfiredoor.com/15615.html

fire rated shutter door,fire rated door,fire entry door,the fire door,a fire door,fire rated shutter door,fire front door,a fire door,fire door regs,fire entry door,fire egress door,fire rated shutter door,anti fire door,a fire door,fire entry door