drop fault indicator relay

例句：

1. 1.The drop fault indicator relay is used to detect and prevent power failures in the system.
   故障指示继电器用于检测和预防系统中的电力故障。
2. 2. The engineers carefully checked the drop fault indicator relay before starting the new project.
   工程师们在启动新项目前仔细检查了故障指示继电器。
3. 3. The drop fault indicator relay is an essential component of the electrical system, providing critical protection against power outages.
   故障指示继电器是电气系统的关键组件，提供对停电的至关重要的保护。