小滚筒

例句：

1. 1. The small roller is used to roll the paper into shape.
   这个小滚筒用来将纸张卷成形状。
2. 2. The cylinder is a common component in many machines for grinding or polishing materials.
   这个圆柱体是许多机器中常见的部件，用于研磨或抛光材料。
3. 3. The roller was designed to improve the efficiency of the conveyor belt system.
   这个滚筒被设计来提高输送带系统的效率。