I hadn't heard of these. Interesting but require a lot of real estate.
Fort Smith Man Revolutionizes Speakers - Entertainment - Times Record - Fort Smith, AR
Fort Smith Man Revolutionizes Speakers - Entertainment - Times Record - Fort Smith, AR
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perhaps he envisions it as working as so. 
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https://cdn4.explainthatstuff.com/how-flush-toilets-work.gif
:https://cdn4.explainthatstuff.com/how-flush-toilets-work.gif
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