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IT95AN000013A1995-03-031995-03-03Keyboard musical instrument with pedal bellows, fitted with bells that can ring with a bi-directional flow of air
IT1280307B1
(en)
INTERCHANGEABLE DEVICE FOR MODULATING THE AIR FLOW BLOWN IN WIND MUSICAL INSTRUMENTS IN PARTICULAR FLUTES AND SIMILAR TO MODULATE THE SOUND AND IMPROVE THEIR TONE