rotary shaft oil seal unit

例句：

1. 1.The rotary shaft oil seal unit iscrucial for maintaining the smooth operation of themachine.
   旋转轴油封装置对于保持机器的平稳运行至关重要。
2. 2. The engineers carefully inspected therotary shaft oil seal unitto ensure its proper functioning.
   工程师们仔细检查了旋转轴油封装置，以确保其正常工作。
3. 3. The rotary shaft oil seal unitwas designed to prevent leakageand maintain the integrity of the machinery.
   旋转轴油封装置被设计用来防止泄漏并维护机械的完整性。