Generally speaking, the fire resistance time of ordinary fire door products is less than one hour, and the fire resistance time of Class A fire door can be up to 1.5 hours, which can play a very good role in reducing the spread speed of fireworks, loss or casualty rate.

class a fire door,孟買的防火門製造商，automatic fire door closers,fire door exit regulations,

防火門廠家,家用防火門,防火門,class a fire door,automatic fire door closers,防火門標準，fire door exit regulations,出口門寬度係數，防火門鎖，出口門寬度係數，

防火，門漆，class a fire door,馬來西亞防火門，金屬門