草莓秋葵黄瓜丝瓜芭乐绿巨人_国产高清无密码一区二区三区_狠狠躁夜夜躁人蜜臀Aⅴ_99精品视频只有精品高清_波多野结衣在线不卡办公室_欧美国产日产在线观看_亚洲图片另类图片_色欲A∨无码蜜臀A∨免费播_亚洲有码精品视频在线观看_日韩黄色人妻视频

Concept: Softening water aims to reduce the hardness of water through physical or chemical means. The hardness of water is mainly composed of cations such as calcium and magnesium. In the process of softening water treatment, the composition and structure of sulfates and chlorides that are prone to scale formation will be changed, making them less prone to scale formation during water heating and evaporation, thereby reducing the hardness of water and achieving the purpose of softening.

General process: The specific methods for softening water treatment include ion exchange method, heat exchange method, chemical precipitation method, and reverse osmosis method, etc