Negative pressure suction device

The utility model discloses a negative pressure suction device, including negative pressure cover, valve and negative pressure pump, the hourglass hopper -shaped of negative pressure cover for invering, its characterized in that at negative pressure cover's open -top and be connected with the p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: LIU BIQING
Format: Patent
Sprache:chi ; eng
Schlagworte:
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