track-side telephone switching device

例句：

1. 1. The track-side telephone switching device is essential for maintaining communication during emergencies.
   在紧急情况下，轨道旁的电话交换机设备对于保持通信至关重要。
2. 2.The engineers were tasked with installing the new track-side telephone switching device at the construction site.
   工程师们被指派在施工现场安装新的轨道旁电话交换机设备。
3. 3. The track-side telephone switching device was designed to improve communication between trains and the station staff.
   轨道旁电话交换机设备的设计目的是改善火车与车站工作人员之间的通信。