stern tube lubricating oil

例句：

1. 1.The engine needs to be lubricated regularly with this type of oil to prevent wear and tear.
   为了预防磨损，发动机需要定期用这种油进行润滑。
2. 2. The engineer replaced the old oil with a new one in the stern tube to improve performance.
   工程师更换了旧的油，以改善性能。
3. 3.Lubricating oil is essential for preventing friction and maintaining the smooth operation of machinery.
   润滑脂对于防止摩擦和保持机械平稳运行至关重要。