Скачать или смотреть Water powered timers hidden in public restrooms

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This is a very clever type of automatic syphon that you find in urinal cisterns.

‪@mrmattandmrchay‬'s video is here:    • The AUTO SYPHON cut open - how it works  
My syphon based binary adder video is here:    • I Made A Water Computer And It Actually Works  

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