The idea of using canoe-fishway was first proposed by Hassinger (2002) and was experimentally conducted in the hydraulic laboratory of the Kassel University. Hassinger and Kraetz (2004) presented the general principles of the canoe-fishway design. The idea of this new development was driven by the thought that a great number of thin and elastic rough elements on the one hand show a go... https://chefesquipmenters.shop/product-category/plungers/