sweepback impeller

例句：

1. 1. The sweeping impeller is designed to efficiently clean the surface of the machine.
   扫掠式叶轮设计用来高效地清洗机器的表面。
2. 2.The sweeping impeller has a unique shape that allows it to move smoothly across the surface of the water.
   扫掠式叶轮有一个独特的形状，使其能够平滑地在水面上移动。
3. 3. The sweeping impeller was used in the cleaning process to remove any debris from the machine.
   扫掠式叶轮用于清洁过程，以去除机器中的任何碎片。