The steel fire door is composed of a steel frame and a steel door leaf. The steel structure can ensure that it is not susceptible to impact deformation and external force damage, and can be used normally for a long time without replacement.

https://ztfiredoor.com/19405.html

class a fire door,steel fire proof door,timbet doors fire rated,hinge for steel fire doors,fire resistance steel door,apartment fire rated door,class a fire door,steel fire rated door,fire resistance steel door,condo door fire rated,timbet doors fire rated,fire door for nuclear power plant,class a fire door,installing fire door,fire resistance steel door,timbet doors fire rated