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| Keywords: Impact-Sprinkler-Patent-Drawing.jpg Zeichnung aus dem US-Patent mit der Nummer 1 997 901 Water Sprinkler von Orton H Englehart das einen Impulsregner darstellt US Patent 1 997 901 Water Sprinkler from Orton H Englehart showing an impact sprinkler http //www rainbird com/corporate/images/Original-Impact-Patent-Drawing jpg / 1933 O H Eglehart Irrigation sprinklers PD-USGov | ||||
