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Keywords from Image Description:
Strmungsmarken im Inn. de Durch abflieendes Wasser im Inn entstandene Strmungsmarken und Strmungsrippel en Ripple marks and stream marks in the bed of the Inn river own Hermann Hammer User Haneburger en You are free to use the picture if you want mention Hermann Hammer as author de Freie Verwendung als Autor kann man Hermann Hammer