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Priority to JP5994886UpriorityCriticalpatent/JPH0342468Y2/ja
Publication of JPS62170990UpublicationCriticalpatent/JPS62170990U/ja
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Publication of JPH0342468Y2publicationCriticalpatent/JPH0342468Y2/ja
Trasduttore dinamico elettroacustico equipaggiato con unica membrana pilotato da n. 2bonine mobili contrapposte e da n.2 circuiti magnetici, pure contrapposti.