line maintenance

例句：

1. 1.The line maintenance team is responsible for the daily operation of the power grid.
   线路维护团队负责电网的日常运营。
2. 2. The company insists on regular line maintenance to ensure the safety of its equipment.
   公司坚持定期进行线路维护以确保其设备的安全。
3. 3. During peak hours, the line maintenance crew must be on standby to respond to any emergencies.
   在高峰时段，线路维护工队必须待命以应对任何紧急情况。