drop feed lubrication

例句：

1. 1. The engineneeds to be properly lubricated to ensure smooth operation.
   发动机需要适当润滑以确保顺畅运行。
2. 2. In the construction industry, drop-feed lubrication is a common practice to reduce wear on machinery.
   在建筑行业中，滴油润滑是一种常见的做法，以减少机械的磨损。
3. 3.The engineer used drop-feed lubrication to improve the efficiency of the machine.
   工程师使用滴油润滑来提高机器的效率。