Improved ventilation device

The utility model discloses an improved ventilation device. The fermentation tank comprises a fermentation tank body, a small ventilation groove is formed in the bottom surface of the interior of thefermentation tank body; a supporting table is fixed in the small ventilation groove; a ventilating br...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	XUE YONGLIN, GUO AIFENG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
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