axle shaft seal

例句：

1. 1.The axle shaft seal was designed to prevent oil from leaking out of the engine.
   轴颈密封设计用来防止机油从发动机中泄漏。
2. 2. The axle shaft seal is an essential component of the transmission system.
   轴颈密封是传动系统的一个关键部件。
3. 3. The axle shaft seal was replaced after it failed during the maintenance check.
   在维护检查时，轴颈密封失效了，因此被更换。