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Goebel VacuumPump. Zeichnung der GoebelVakuumpumpe vom Patentblatt des USPatentamtes Patentblattbr de Wdwd CommonsHelper Heinrich Gbel later Henry Goebel April December br gescannt von Benutzer hgnp Hgnp at org de PDold Original upload log de GoebelVacuumPump Hgnp bytes no Andere Versionen verffentlicht in den