cylindrical superfinishing

例句：

1. 1. The car is cylindrical in shape.
   这辆车的形状是圆柱形的。
2. 2. A cylinder is a solid with a circular cross-section.
   一个圆柱是一个有圆形横截面的固体。
3. 3. The cylinder was used to store the oil.
   这个圆柱用来储存油。