Dustproof blackboard

The utility model relates to a dustproof blackboard, which comprises a blackboard surface, wherein a dust groove is formed under the blackboard surface; a filtering net is arranged at the upper end of the dust groove; an activated carbon bag is arranged in the dust groove; the dust groove is in a W...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	HAO YANMEI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES FOR WRITING OR DRAWING ARTICLES FOR WRITING OR DRAWING UPON BUREAU ACCESSORIES PERFORMING OPERATIONS TRANSPORTING WRITING OR DRAWING IMPLEMENTS
Online-Zugang:	Volltext bestellen
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