结果表明：在雷诺数一定的情况下，增大过滤器的孔隙率，则过滤效率增加；
The results showed that the filtering efficiency was improved with the increase of filter's porosity under constant Re number and with the decrease of Re value under constant filter's porosity .
结果表明：在雷诺数一定的情况下，增大过滤器的孔隙率，则过滤效率增加；
The results showed that the filtering efficiency was improved with the increase of filter's porosity under constant Re number and with the decrease of Re value under constant filter's porosity .
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