friction countershaft

例句：

1. 1.The friction countershaft is crucial forthe smooth operation of the machine.
   摩擦式传动轴对于机器的平稳运行至关重要。
2. 2. Theengineer designed a new friction countershaftto improve efficiency.
   工程师设计了一种新型的摩擦式传动轴以提高效率。
3. 3. The friction countershaft was installed in the engine,allowing for better transmission of power.
   摩擦式传动轴被安装在发动机中，以便更好地传递动力。