In the correct view of China’s development prospects, we will also consider the fire safety issues in these public facilities. Once the fires in the public areas cannot be controlled, the fire will spread quickly. This is unbearable for the people! Therefore, in recent years, the state has provided a

There must be a lot of dust falling on the side of the door of the fire door closer. If it is a long time, it will form very difficult dust, which will make the door closer switch very insensitive, and even form a severe phenomenon that cannot be switched.

The specifications of the door closers for wood fire doors, steel wood fire doors and steel fire doors can be unified according to the original steel fire door standards. The door models with strip glass and those without strip glass doors are the same.(1) Dealing with problems: There are different types of door