oil sprayer

例句：

1. 1. The oil sprayer is used to coat the surface of the metal with oil.
   喷油器用于给金属表面涂上油。
2. 2. The oil sprayer was designed to prevent rust on the metal parts.
   喷油器被设计用来防止金属部件生锈。
3. 3. The oil sprayer was used to clean the engine parts before they were assembled.
   喷油器被用来在组装前清洁发动机部件。