slot gate

例句：

1. 1.The slot gate is a crucial component in the security system.
   插槽门是安全系统的关键组成部分。
2. 2. The engineer designed the slot gate to fit perfectly into the wall.
   工程师设计了插槽门，使其完美地嵌入墙中。
3. 3.The slot gate was used to prevent unauthorized access to the building.
   插槽门被用来阻止未经授权进入大楼。