Negative pressure suction alarm device

The utility model relates to a negative pressure suction alarm device, which comprises a placing seat, a button, a buzzer and a spring, the placing seat is provided with a groove, the button is arranged on the bottom wall of the groove, the spring is sleeved on the button, one end of the spring is f...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LONG XIGUI, LIU ZHENKAI, QIN XIAOYAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE
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