effective filter porosity 过滤器有效孔隙率
filter porosity of well 管井过滤器孔隙率
filter porosity in well 管井过滤器孔隙率
porosity of filter 过滤器孔隙度
porosity of filter cake 滤饼孔隙率
effective porosity of filter 过滤器有效孔隙率
The choice of this enclosure material responds, on the one hand, to its role as a solar filter offering at the same time porosity, light entrance and ventilation to the elevator case.
外围护结构材料的选择，一方面，由于孔隙率的控制使其成为太阳滤波器，可以照入一些阳光，照亮入口空间，也有利于梯井内的通风。
The target porosity and thickness of pavement of the permeable asphalt mixture on the basis of the factors such as reducing the runoff, the filter ability of soil base and pavement overflow.
基于减小地表径流、土基渗透能力及铺装溢流量等方面因素，设计透水性沥青混合料的目标孔隙率及铺装厚度；
Experiments showed decreased porosity of the filter bed along the filtering direction.
试验发现，短纤维束滤料滤层的孔隙率沿过滤方向由大到小，为变孔隙滤层。
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