rough filtration meaning in Chinese

粗滤

This study tries to use upflow rough filtration as the pretreatment for slow sand filtration
摘要尝试采用上向流粗滤，作为慢滤池的预处理。
Both results of the experiment and simulation show upflow rough filtration holds the characteristics of simple operation , easy maintenance and stable performance
试验及模拟结果均表明：此上向流粗滤操作维护简单，运行稳定。
A computer - aided simulation used to observe the influence of changing filtration parameter on upflow rough filtration is necessary because of the long term of operation cycle
由于粗滤池的运行周期很长，故采用了计算机模拟的方式观察运行参数变化对粗滤池的影响。