control and primary scavenging pump

例句：

1. 1.The control and primary scavenging pump is responsible for removing pollutants from the air.
   控制和初级清扫泵负责从空气中去除污染物。
2. 2. The primary scavenging pump is designed to remove contaminants from the water before it reaches the treatment plant.
   初级清扫泵设计用来在水到达处理厂之前去除污染物。
3. 3. The control and primary scavenging pumps are essential components of the wastewater treatment system.
   控制和初级清扫泵是废水处理系统的关键组成部分。