two layered cylinder

例句：

1. 1. This machine hasa two-layered cylinder that rotates at high speeds.
   这台机器有一个双层圆柱体，以高速旋转。
2. 2.The new design of the car features atwo-layered cylinder for better fuelefficiency.
   汽车的新设计采用了双层圆柱体，以提高燃油效率。
3. 3. The construction of thebridge involved a two-layered cylinderto support its weight.
   建造这座桥梁时使用了双层圆柱体来支撑其重量。