fault locator for overhead contact line equipment

例句：

1. 1. Thefault locator was used to locate theproblem in the circuit.
   故障定位器被用来在电路中定位问题。
2. 2. The engineers used the fault locator to identifythe root cause of the failure.
   工程师们使用故障定位器来识别故障的根本原因。
3. 3. The fault locator helped us quicklyidentify and fix the issue.
   故障定位器帮助我们迅速识别并解决了问题。