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('Wet' rainwater harvesting system with 'trough' water filter for potable water production. Based on a drawing from the book "Duurzaam en Gezond Bouwen en Wonen" by Hugo Vanderstadt. Public Domain, released by Wikimedia Commons here https://en.wikipedia.org/wiki/File:Rainwater_harvesting_system.svg) |
(Julian uploaded a new version of File:Rainwater catchment wet system.jpg) |