Voice emergency call device

The utility model relates to the technical field of calling devices, and discloses a voice emergency calling device which comprises a voice emergency calling machine which is provided with a reply extrusion piece used for pressing a calling button of the voice emergency calling machine. And the retu...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HUANG HONGZHAO, SHI JIAMING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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