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Rope pump

6 bytes removed, 02:08, 9 November 2012
Acknowledgements
* RWSN: The Rope Pump Concept [http://www.rural-water-supply.net/en/resources/details/294 English], [http://www.rural-water-supply.net/en/resources/details/296 French], [http://www.rural-water-supply.net/en/resources/details/336 Portuguese]
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