trigger relay

例句：

1. 1. The trigger relay is responsible for controlling the flow of electricity in the circuit.
   触发器继电器负责控制电路中电流的流动。
2. 2. The relay was designed to switch high-voltage power from one circuit to another.
   继电器被设计用来从一个电路切换到另一个电路的高电压电源。
3. 3. The trigger relay was used to detect when a door was opened.
   触发器继电器用于检测门是否打开。