pinhole grinder

例句：

1. 1. Thispinhole grinder is incredibly precise and can be used for a wide range of applications.
   这款针孔研磨机非常精确，可以应用于各种应用。
2. 2. The engineers at the factory use this pinhole grinder to produce high-quality parts for their machines.
   工厂的工程师们使用这款针孔研磨机来生产机器的高质量部件。
3. 3. The pinhole grinder is essential for removing small scratches and dents from metal surfaces.
   针孔研磨机对于去除金属表面小划痕和凹痕至关重要。