slow relay

例句：

1. 1. The slow relay is responsible for controlling the speed of the motor.
   慢速继电器负责控制电机的速度。
2. 2. In this circuit, the slow relay is used to prevent overheating.
   在这个电路中，慢速继电器用于防止过热。
3. 3. The slow relay was designed to improve the reliability of the system.
   慢速继电器被设计用来提高系统可靠性。