spiral oil grooves

例句：

1. 1.The machine has a spiral oil groove design that makes it easy to clean.
   这台机器有一个螺旋油槽设计，使得清洁变得容易。
2. 2. The spiral oil grooves on the surface of the engine are designed to reduce friction and improve efficiency.
   发动机表面的螺旋油槽设计是为了减少摩擦并提高效率。
3. 3. The engineer used a special tool to remove the spiral oil grooves from the gears.
   工程师使用一种特殊的工具从齿轮上去除螺旋油槽。