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Prins HH . en The stilts pontoon Prins and the selfpropelled hopper barge HH on the southern bank of the Elbe river between Cuxhaven and Otterndorf Construction of groynes for bank protection de Der Stelzenponton Prins des Unternehmens Van den Herik und die Klappschute HH bei Arbeiten am sdlichen Elbufer zwischen Cuxhaven und