finned cylinder

例句：

1. 1. The engineer designed a finned cylinder to improve the efficiency of the cooling system.
   工程师设计了一个有衬里的圆柱体，以提高冷却系统的效率。
2. 2.The construction worker used a finned cylinder to support the heavy load on the roof.
   建筑工人使用一个有衬里的圆柱体来支撑屋顶上的重负载。
3. 3.The scientist conducted experiments using a finned cylinder to study the flow of fluids.
   科学家使用一个有衬里的圆柱体进行实验，研究流体的流动。