free wheeling axle

例句：

1. 1.The free wheeling axle system is the most efficient way to transport heavy loads.
   自由轮轴系统是运输重物最高效的方式。
2. 2. The engineers designed the new axle with a unique free wheeling feature.
   工程师们设计了新的轴，具有独特的自由轮特性。
3. 3.The company's latest model uses a free wheeling axle to improve fuel efficiency.
   该公司的最新型号使用了自由轮轴以提高燃油效率。