Jones reductor

例句：

1. 1. The Jones reductor is used to reduce the size of objects.
   琼斯还原器用于减小物体的尺寸。
2. 2. The Jones reductor was developed by a team of engineers.
   琼斯还原器是由一个工程师团队开发的。
3. 3. The Jones reductor is an essential tool for precision work.
   琼斯还原器是精密工作所必需的工具。