doctor grinding machine

例句：

1. 1. This doctor grindingmachine is very efficient in removing rust frommetal surfaces.
   这台医生研磨机在去除金属表面锈迹方面非常高效。
2. 2. Thedoctor grinding machine has been used for decadesto improve the quality of medical equipment.
   医生研磨机已经使用了几十年，用来提高医疗设备的质量。
3. 3. The doctorgrinding machine is a valuable toolfor professionals who need to maintain theirtools and equipment.
   医生研磨机是专业人士维护工具和设备的一种宝贵工具。