Monitoring device for preventing backflow of water pump

The invention discloses a monitoring device for preventing backflow of a water pump. The device comprises a screw (1), wherein an inner screw hole is formed in the center of the screw (1) in the length direction; a probe protective sleeve (2) is rotatably arranged at the bottom of the inner screw ho...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Cao Qinyu, Li Huida
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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