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Priority to JP1987091812UpriorityCriticalpatent/JPH0312982Y2/ja
Publication of JPS63201225UpublicationCriticalpatent/JPS63201225U/ja
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Inrichting voor het omzetten van elektrische in akoestische trillingen en omgekeerd, voorzien van een membraan, bevattende tenminste een laag piezo-elektrisch polymeer materiaal.
