滚轴

例句：

1. 1. The roller is used to rollthe dough into a ball.
   滚筒用于将面团滚成球。
2. 2. The roller was usedto make the paper thinner.
   滚筒被用来使纸更薄。
3. 3. Theroller is an essential toolfor printing presses.
   滚筒是印刷机不可或缺的工具。