chemical circulation cleaning

例句：

1. 1.The chemical circulation cleaning process is crucial for the purification of water.
   化学循环清洁过程对于水的净化至关重要。
2. 2. The chemical circulation cleaning equipment was designed to remove pollutants from the environment.
   化学循环清洁设备被设计用来从环境中去除污染物。
3. 3. The chemical circulation cleaning system is used in hospitals to sterilize medical equipment.
   化学循环清洁系统在医院用于消毒医疗设备。