coded rail circuit

例句：

1. 1.The new security system uses a coded rail circuit to prevent unauthorized access.
   新的安全系统使用编码的铁路电路来防止未经授权的访问。
2. 2.The train was equipped with a coded rail circuit to enhance communication between the train and the control center.
   火车配备了编码的铁路电路，以增强火车与控制中心之间的通信。
3. 3.The engineers were able to use a coded rail circuit to quickly diagnose and fix the fault in the electrical system.
   工程师们能够使用编码的铁路电路来快速诊断并修复电气系统中的故障。