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ArchimedesSketch.svg en Sketch of Archimedes screw turbine de Skizze einer Wasserkraftschnecke own Jahobr File KaplanSketch svg Kaplan File STurbineSketch svg STurbine File BulbTurbineSketch svg Bulb File TubularGearTurbineSketch svg Tubular gear File StrafloSketch svg Straflo File FrancisSketch svg Francis File OssbergerSketch