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| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 13:51, 24 August 2008 | HydraulicRamChildren.jpg (file) |  |
389 KB | Children standing around a Hydraulic Ram pump, produced by AIDF, Phillippines | 1 |
| 13:41, 24 August 2008 | PrincipleHydraulicRam.jpg (file) |  |
76 KB | The principle of a Hydraulic Ram pump. Water flowing down the drive pipe speeds up until the water pushes the waste valve closed. The water in the pipe is still moving, and for a short time creates a high pressure in the pump body (water hammer effect), w | 1 |
| 13:03, 24 August 2008 | RopePumpBicycle.jpg (file) |  |
443 KB | Bicycle powered rope pump, produced and used in Nicaragua. | 1 |
| 12:56, 24 August 2008 | RopePumpZambia.jpg (file) |  |
688 KB | Rope pump used for small-scale irrigation in Zambia. Photo: Henk Holtslag. | 1 |
| 12:47, 24 August 2008 | RopePumpMozambique.JPG (file) |  |
700 KB | Rope pump on a borehole, produced by a local workshop in Mozambique. Photo: Henk Holtslag | 1 |
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