All -round prevention myopia protector

The utility model relates to an all -round prevention myopia protector, including the bottom plate and articulating in the mounting panel of bottom plate tip, be equipped with distance sensor, alarm and photo resistance on the bottom plate, be equipped with power, control panel and input device on t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	YAN CUNYING, GUO SHENGQUAN, WANG CHAO, ZHAO HAIJUN, TIAN CUNWEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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