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Solution of the week 12

30 bytes removed, 23:43, 18 May 2015
→‎Links
* [http://www.youtube.com/watch?v=0ovPSSOs76U Video on AIDFI Hydraulic Ram, produced by Ashden Award]
* [http://www.youtube.com/watch?v=zIJoowE2tz0 Video on installation of Hydraulic Ram pumps in Afghanistan by AIDFI]
* [http://practicalactionconsulting.org/docs/technical_information_service/hydraulic_ram_pumps.pdf Information on hydraulic Hydraulic ram pumps by Practical Action]* [http://www2.warwick.ac.uk/fac/sci/eng/research/dtu/pubs/tr/lift/ Information on ram Ram pumps by the Development Technology Unit, University of Warwick]
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