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Piaget Cartier Alphonse
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Piaget Cartier Alphonse
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Priority to ES26835ApriorityCriticalpatent/ES26835A1/es
Publication of ES26835A1publicationCriticalpatent/ES26835A1/es
Un nuevo aparato que permite volver automáticamente y con toda facilidad las hojas del método o pieza de música al tiempo de ejecutarla en el piano denominado "Hualde".