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Bibliographic Details
Main Authors OGASAWARA YASUAKI, MAEKAWA KOJI
Format Patent
LanguageChinese
English
Published 12.06.2013
Subjects
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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Bibliography:Application Number: CN20098107600