The relation between pore structure and permeability of nonwoven filtration materials was described.
研究了非织造过滤材料的孔隙结构与透气性之间的关系。
The disadvantage of API filtration test to evaluate mud cake quality is analyzed. A method, taking mud cake strength, permeability and thickness as main evaluation factors is introduced.
分析了API滤失试验的缺点和确定泥饼质量的关键因素，介绍了用泥饼强度、泥饼渗透率和泥饼厚度评价泥饼质量的试验方法。
Filtration media is required to have suitable pore size, pore size distribution, pore volume, pore surface area and permeability for performing satisfactorily in applications.
为使过滤材料在使用中达到令人满意的性能，要求过滤介质具有适宜的孔径尺寸、孔径分布、孔体积、孔表面积及渗透性。
With HEPA filtration products as an example, it is used in the automobile air filtering, diesel oil filtering and the mask with 99% permeability.
以技术产品HEPA过滤产品为例：用于汽车空气进入过滤和柴油过滤，以及消耗产品具有99%渗透效率的口罩。
The permeability, porosity and thickness of mudcakes formed under dynamic filtration were studied with HTHP dynamic flowmeter.
用高温高压动态流动装置对泥浆动失水下形成的泥饼的渗透率、孔隙度及泥饼厚度的影响因素进行了研究。
To give better filtration properties to filtration fabric, a penetrating ability should be achieved included air permeability. Water permeability and penetrating property.
要使滤布有很好的过滤性能，就必须具有良好的透通性，即透气性、透水性及渗透性。
With the thickness of gradient layers increasing, the permeability of the composites decreased while the filtration precision increased.
随着梯度层厚度的增加，复合材料的透过性能下降，过滤精度提高。
It is proposed that constant filtration rate can be used to evaluate the permeability of filter cakes.
实验研究了滤饼渗透率的变化规律及测定方法，认为用恒定滤失速率表示滤饼渗透性是较好的方法。
This makes the intensive study of the horizontal well filtration theory of the low permeability gas reservoir and the accurately grasp of the production performance become essential.
这使得深入研究低渗透气藏中水平井渗流理论，准确把握其生产动态成为必要。
This makes the intensive study of the horizontal well filtration theory of the low permeability gas reservoir and the accurately grasp of the production performance become essential.
这使得深入研究低渗透气藏中水平井渗流理论，准确把握其生产动态成为必要。
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