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- Low to medium efficiency (20-50%)
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==Acknowledgements==
* Jane Olley, [http://www.cd3wd.com/cd3wd_40/cd3wd/Practact/KnO-100410-human_animal_water_lifters.pdf HUMAN & ANIMAL POWERED WATER-LIFTING DEVICES FOR IRRIGATION]. Practical Action, November 2008.
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