electrical locomotive

例句：

1. 1. The railway line is equipped with several electrical locomotives for smooth operation.
   铁路线配备了几台电力机车，以便于顺畅运行。
2. 2. The engineers are responsible for maintaining the safety and efficiency of the electrical locomotives.
   工程师们负责维护电力机车的安全和效率。
3. 3. The new model of the electrical locomotives has been launched, which greatly improves the transportation efficiency.
   新型电力机车已经推出，大大提高了运输效率。