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Fotothek df tg Physik Mechanik Musikinstrument Wasserorgel. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Frankfurt Main Wasserorgel Querschnitt Papier Holzschnitt cm Physik Mechanik Musikinstrument Wasserorgel ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte