Different methods are described to measure sludge sedimentation and filtration properties, by use of sedimentation indices, initial sedimentation velocity and capillary suction time.
利用沉积作用，最初的沉积作用速度和吸附时间，描述测量烂泥沉积作用和过滤产物的不同方法。
The models pre-dict particle concentration as a function of the flow rate, the particle removal efficiency of the filter, and filtration time.
这些模型预测了粒子浓度与流速、过滤器的粒子去除效率及过滤时间的关系。
Companies, especially multinationals, based in these cities are spending tens of thousands of dollars to install air filtration systems and real-time pollution monitoring devices in their offices.
各个将总部设置在这些城市的公司(尤其是跨国公司)都花费上万美金，在办公室内安装空气过滤系统和实时污染监测设备。
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