buzzer relay

例句：

1. 1. The buzzer relay is responsible for alerting the security personnel when someone enters the building.
   蜂鸣器继电器负责在有人进入大楼时通知安保人员。
2. 2.The relay is used to transfer electrical signals from one circuit to another.
   继电器用于将一个电路的电信号传递到另一个电路。
3. 3.The relay is an essential component in many electrical systems.
   继电器是许多电气系统中不可或缺的组成部分。