track defect indicator car

例句：

1. 1.The track defect indicator car was used to monitor the quality of the railway tracks.
   跟踪缺陷指示车被用来监测铁路轨道的质量。
2. 2.The track defect indicator car helped us identify and fix any potential problems with the railway system.
   跟踪缺陷指示车帮助我们识别并修复铁路系统的潜在问题。
3. 3. The track defect indicator car is essential for maintaining the safety and efficiency of our railway network.
   跟踪缺陷指示车对于维护我们铁路网络的安全和效率至关重要。