| 摘要 |
A door actuating system for the leaf of a fire door includes a safety fuse that detaches the fixture between the housing of the door actuating system and an arm on the door or the door frame, which then falls on the floor and are no longer in contact with the hot surface of the door. Plastic screws and plastic bushings accomodating metals screws or assembly plates made of plastic or similar materials can be used as the safety fuse. |
