Telescopic side and the diaphragm structure improvement

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Bibliographic Details
Main Author CAO, YUE-MING
Format Patent
LanguageChinese
English
Published 21.07.2011
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: TW20100222049U