greasing apparatus

例句：

1. 1. The engineer greased the gears before starting the machine.
   工程师在启动机器前给齿轮加润滑油。
2. 2. The newoil-free lubrication apparatus is designed to reduce wear and extendlife.
   新型无油润滑装置设计用于减少磨损并延长使用寿命。
3. 3. Thetechnician carefully greased allmoving parts of the machine toensure smooth operation.
   技术员仔细给机器的所有移动部件加润滑油，以确保顺畅运行。