indicated relay

例句：

1. 1. The systemuses a type of indicative relay to control the speed of the conveyor belt.
   该系统使用一种指示继电器来控制输送带的速度。
2. 2. The indicative relay is designed to detect when the sensor is not functioning properly.
   指示继电器被设计用来检测传感器是否工作不正常。
3. 3. In this case, the indicative relay was used to prevent the machine from overloading.
   在这种情况下，指示继电器被用来防止机器过载。