closure works

例句：

1. 3.
   建筑或机械
2. 1. The engineer designed a closure work to ensure the safety of the construction site.
   工程师设计了一个闭锁装置以确保施工现场的安全。
3. 2. The machine has a close-off feature that prevents unauthorized access.
   这台机器有一个闭锁功能，防止未经授权的访问。
4. 3. The factory uses a locking mechanism to secure its valuable equipment.
   工厂使用一个闭锁机制来安全地存放其贵重设备。