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Keywords from Image Description:
Orffyreus Das Mersseburgische Perpetuum Mobile. Das Mersseburgische Perpetuum Mobile Triumphans Perpetuum Mobile Orffyreanum via sub unigoettingen de cgi PPN SUB Gttingen Johann Ernst Elias Bessler Orffyreus PDold in Germany Johann Bessler History of Merseburg thcentury technical drawings Perpetuum Mobile