main haulage track

例句：

1. 1.The main haulage track is the main road through the city.
   主要货运轨道是穿过城市的主干道。
2. 2. Main haulage tracks are used for transporting heavy goods.
   主要货运轨道用于运输重型货物。
3. 3. The construction of the main haulage track was completed in two years.
   主要货运轨道的建设在两年内完成。