convolver

例句：

1. 1. The convolver is used to rotate the material beingprocessed.
   回旋器用于旋转正在处理的材料。
2. 2. The engineer designed a new convolver to improve efficiency.
   工程师设计了一种新型的回旋器以提高效率。
3. 3. The convolver was responsible for rotating thegears in the machine.
   回旋器负责转动机器中的齿轮。