The utility model can effectively filter air and make the molecules of the air fine.

本实用新型可有效滤净空气，并使空气的分子细小化。

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A MERV rating tells you how well the filter can remove pollen and mold from the air as it passes through.

MERV 等级可以让你知道当花粉和霉菌在空气中传播时，过滤器将如何将之过滤。

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Connect Intake-tube with intake-tube of air filter of the rewinder, then get through entering power source.

将进气管与复卷机空气过滤器的进气管相连，然后进入电源。

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Some had suggested putting filters on top of skyscrapers to filter air pollution from the clouds, but were met with laughter.

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In an effort to identify plants that can filter air in sealed environments, NASA and the Associated Landscape Contractors of America tested common plants to determine the best natural filters.

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By contrast, energy companies run their turbines continuously at constant speeds and filter the air intake against damaging particles.

FORBES: Energy