Water purification systems may follow the initial pretreatment steps in various sequences depending on the characteristics of the water and the design of the system.
水纯化系统可能跟随在初始的预处理步骤后面，根据水规格参数的不同有多种顺序和系统设计。
2
Some physical process of boiler waterpretreatment have been summed up.
着重就锅炉用水预处理的物理方法进行了综述。
3
With a pilot scale test, the pretreatmentof polluted reservoir water by biological contact oxidation process with three-dimensional web-like media was carried out.