滤芯过滤孔径外大内小，具有优良的深层过滤效果。
As the outer bore diameter is larger than the inner one, the filter cartridges have a good deep-level filtering capability.
通过微球的分析，可以用来确定在过滤器的最大孔径。
Analysis of the microspheres passing can be used to determine the maximum pore sizes in the filter.
以系列孔径分布的孔梯度陶瓷作为一种高效过滤材料。
Pore gradient ceramics with a series of pore sizes is the high efficient filtration material.
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