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Neuerung an Pianino - Mechaniken
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1900-01-01
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(de )
Mechanik für Flügel und tafelförmige Klaviere
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(de )
Oktavenkuppelung für Pianino's
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(de )
1978-08-03
Klaviermechanik
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(de )
Pianoforte-Mechanik
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(de )
Neuerung an Schanktisch-Korkenziehern
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(de )
Vorrichtung zum Stummmachen von Pianino's