Rotary combined's ear muff fixed knot constructs

The utility model belongs to the technical field of the earphone technique and specifically relates to indicate a rotary combined's ear muff fixed knot constructs, it is including the earlap and locate the face -piece that this earlap outside just is used for fixed ear muff, be equipped with ro...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Hu Zhongji, Liu Zhihua
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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