Re: [OM] [OT] Two questions about the English language

[Rick Beckrich]

The actuator on small air compressors 
(like the one I use for air-brush work) 
also is a diaphragm, as was the thin
disc in early microphones that trans-
formed vibration into electrical signals.
And don't forget the membrane that
separates your thorax from your
abdominal cavity.
 Rick, lurking in VA


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