reverse impeller

例句：

1. 1. The reverse impeller is used to reverse the direction of the flow in a pump.
   反向叶轮用于将泵中流体的方向逆转。
2. 2.The design of the reverse impeller has been optimized for better efficiency.
   反向叶轮的设计已经优化，以提高效率。
3. 3. In this experiment, we tested the reverse impeller's ability to handle high pressure and low flow rates.
   在这个实验中，我们测试了反向叶轮处理高压力和低流量的能力。