Electret filtration material is a kind of promising new air filtration material due to the advantages of high filtration efficiency, low flow resistance, power saving and anti-bacteria.

驻极体过滤材料具有高效、低阻、节能、抗菌等优点，是一类非常有应用前景的新型空气过滤材料。

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After field sideline test, PALL filter with high filtration accuracy was selected for filtering and separating raw gas.

经过现场侧线试验，选择了过滤精度高的PALL过滤器过滤分离原料天然气。

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The high filtration efficiency means the good filtration results, however high pressure drop will cause the waste of energy.

高过滤效率意味着良好的过滤效果，而高运行阻力会带来巨大的能源浪费。

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Teens design pedal-powered filtration system: High-schoolers Payton Karr and Kiona Elliot , from Oakland Park, Florida , led a team of inventors who designed a collapsible, transportable, bicycle-powered emergency water-sanitation station that filters E. coli and other harmful pathogens from contaminated water.

WHITEHOUSE: The White House

With complex purification technology beyond the reach of the many developing world communities that suffer from dangerously high levels of the toxic metalloid element in their water supply, this surprisingly simple method of filtration, could quite literally save lives.

FORBES: "Plastic Bottle" Filters Can Help Millions Poisoned by Arsenic-Contaminated Water