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Disinfection water manifold

Rainwater harvesting — is the gathering, or accumulating and storing, of rainwater. [ [http://www.harvesth2o.com/faq.shtml Definition of rainwater harvesting] ] Traditionally, rainwater harvesting has been practiced in arid and semi arid areas, and has provided… … Wikipedia
History of Medicine — History of Medicine † Catholic Encyclopedia ► History of Medicine The history of medical science, considered as a part of the general history of civilization, should logically begin in Mesopotamia, where tradition and philological… … Catholic encyclopedia
Zurich — For other uses, see Zurich (disambiguation). Zurich Top: Night view of Zurich from Üetliberg, Middle left: National Museum, Mi … Wikipedia