1. Mechanical interlocking: mechanical interlocking devices are used in the design of doors, such as traditional door locks and cross-bar locks. In this way, when one door is opened, the other door will be locked and cannot be opened, thus realizing interlocking control.

2. Electronic interlocking: Use electronic control system to install proximity switches or other sensors on two doors. When one of the doors is opened, the sensor sends a signal to the control system, and the control system will prohibit opening the other door. This can be achieved by electromagnetic locks and other devices.