Before rolling, she sorted the filter tips by size and color to make the cigarettes uniform.

During the clarification process, the filter cake became so thick that we had to stop the flow and clean the press.

The engineer inspected the filter tubes for corrosion before approving the shipment.

To minimize ripple in the passband, we chose Butterworth filters for the audio processing chain.

The audio engineer adjusted the filter banks to improve the clarity of the recording.

The laboratory ordered several interference filters to improve the spectrometer's wavelength selection.

The engineer adjusted several notch filters to eliminate the hum from the audio recording.

To remove the 60 Hz hum from the recording, we applied a notch filter to the audio track.

The technician replaced the clogged filter card and resumed the filtration process.

The municipal water treatment facility upgraded its filter beds to improve overall water quality.