steering knuckle case oil seal retainer

例句：

1. 1. The car's steering systemis a critical component of its performance.
   汽车的转向系统是其性能的关键组成部分。
2. 2.The engineer carefully inspected the joint retainer before installing the new part.
   工程师在安装新部件之前仔细检查了接头保持器。
3. 3. The oil seal retainer prevents leakage during operation.
   油封保持器在操作过程中防止泄漏。