position signal indicator

例句：

1. 1. The positionsignal indicator is used to indicate the locationof a device on a map.
   定位信号指示器用于在地图上指示设备的位置。
2. 2. The engineer used the position signal indicatorto pinpoint the exact location of thefault.
   工程师使用定位信号指示器精确定位故障点。
3. 3. The position signal indicator wascrucial in ensuring the safety of the workersduring construction.
   定位信号指示器在施工过程中确保工人安全至关重要。