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User:Demotech

...ady some time ago. We knew this website too and contributed to it with how Demotech's work relates to AKVO. But now I check this contribution, it has disappear ...te http://www.demotech.org . All our designs are to be found at http://www.demotech.org/d-design/d-alldesign.php , many regarding water and sanitation

1 KB (242 words) - 11:01, 11 July 2018

Rope pump

...by numerous individuals, the most prominent of which were R. van Tijen of Demotech, J. Haemhouts <ref>Sandiford, Peter, et al. [http://www.washdoc.info/docsea

30 KB (4,758 words) - 23:38, 31 December 2019
User:Demotech

...ady some time ago. We knew this website too and contributed to it with how Demotech's work relates to AKVO. But now I check this contribution, it has disappear ...te http://www.demotech.org . All our designs are to be found at http://www.demotech.org/d-design/d-alldesign.php , many regarding water and sanitation

1 KB (242 words) - 11:01, 11 July 2018
Solution of the week 9

In the 70s, R. Van Tijen of the Dutch Demotech organisation reintroduced the pump, and started using modern materials such

5 KB (843 words) - 01:18, 19 May 2015