steam traction

例句：

1. 1. The steam traction engine is responsible for the smooth operation of the train.
   蒸汽牵引机负责火车的平稳运行。
2. 2. The steam traction system has been widely used in locomotives and heavy-duty vehicles.
   蒸汽牵引系统在机车和重型车辆中得到了广泛应用。
3. 3. The steam traction system can provide a significant increase in power output compared to traditional engines.
   与传统引擎相比，蒸汽牵引系统能显著提高输出功率。