single-contact wire system

例句：

1. 1. The newsingle-contact wire system has greatly improved the efficiency of power transmission.
   新的单接触线系统大大提高了电力传输的效率。
2. 2.The installation of this single-contact wire system is expected to reduce energy consumption by 30%.
   安装这种单接触线系统预计将减少能源消耗30%。
3. 3.The single-contact wire system was designed to prevent electrical shocks during construction work.
   单接触线系统被设计用来在施工过程中防止触电。