The company uses filters to remove such impurities, but for some reason they were not changed when they should have been.

He guessed filters removed any radioactive dust from the air intake.

She uncapped the sandsnorkel, removed the long filter within it.

Then the digital filter removes the unwanted high frequency content.

This filter removes liquid water, oil and particulate from the compressed air.

It is distinguished from air cleaners, which use disposable filters to remove dust.

A filter removed any unpleasant odors before the air was returned to the cabin.

An electronic filter removes the carrier frequency, and the data signal is output for use.

He said he was concerned that filters might not remove "100 percent" of any contaminants.