spheric washer

例句：

1. 1.The spheric washer is used to polish the surface of a ball.
   球面洗涤器用于抛光球的表面。
2. 2. The spheric washer is essential for maintaining the smoothness of the sphere's surface.
   球面洗涤器对于保持球表面光滑至关重要。
3. 3. The spheric washer is used in the manufacturing process to ensure the quality of the finished product.
   球面洗涤器在生产过程中被使用，以确保成品的质量。