Device Features: small occupation, short backwash time, less water amount for back-washing, etc.
装置特点：占地面积小、反冲洗时间短、反洗水量少等。
This model can describe the effect of backwash and time-varying influent conditions on biofilters.
该模型能动态描述进水及反冲洗过程对生物滤池状态和处理效果的影响。
This sets up a trump winner for West, but he is backwash-squeezed at the same time.
这给西打好了一个将牌赢张，但是他也同时被回流挤压。
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