lock-up relay

例句：

1. 1. The lock-up relay is used to protect the circuit from short circuits.
   锁闭继电器用于保护电路免受短路。
2. 2. The safety relay ensures that the power supply remains stable during emergency situations.
   安全继电器确保在紧急情况下电源供应保持稳定。
3. 3. The control relay allows for precise timing and sequencing of electrical components.
   控制继电器允许精确的时间和顺序控制电气组件。