1. Install a bolt on the door near the upper door frame; The right door is equipped with a padlock at the outer door frame. Open the bolt to come out from the inside, and open the lock to come in from the outside.
2. Use hard cards, such as bank cards and shopping cards.
Insert the long side of the card between the door frame and the lock, and insert the card into the door at the top of the lock tongue. Insert the card obliquely downward behind the locking tongue. Pull the card slowly and forcefully and turn the door handle. With luck, the card just got stuck between the bolt and the door frame. Pull outward to make the bolt completely separate from the door frame. As long as you can catch the door between the latch and the door frame, the door will be opened.
Installation of the door begins:
The process of door installation: measurement and cutting → door frame installation → door leaf installation → door sideline assembly. Cut the door opening according to the original structural size reserved by the wall for the door. First, level the uneven wall foundation with a flat shovel and lime, so as to ensure the stability when installing the door frame and prevent skew.
Tip:
Under normal circumstances, the size of the door frame and door is customized in advance, and it is also inspected before installation, so there will be no cutting phenomenon. Generally, it is the thickness that needs to be cut, that is, in the process of installing the door frame, it is found that the door frame is slightly thick, and in order to make the door better fit with the grassroots wall, the door frame has been cut and modified to a certain extent.
Refer to the above content: Baidu Encyclopedia-Door Bolt