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Priority to JP1985106597UpriorityCriticalpatent/JPH0537350Y2/ja
Publication of JPS6218781UpublicationCriticalpatent/JPS6218781U/ja
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Dispositif et son procede pour visualiser automatiquement la position des doigts sur l'instrument pour apprendre rapidement des accords et des harmonies composant les accompagnements des melodies