closing and checking mechanisms for doors

例句：

1. 1.The new security system has a closing and checking mechanism for doors that ensures the safety of our property.
   新的安全系统具有门的关闭和检查机制，确保我们财产的安全。
2. 2. The engineer designed the mechanism to ensure efficient operation of the door.
   工程师设计了该机制，以确保门的高效运行。
3. 3.The company has implemented a comprehensive check and balance mechanism for all departments' doors.
   公司已经实施了一个全面的检查和平衡机制，对所有部门的门进行审查。