Dust collection type blackboard eraser

The utility model discloses a dust collection type blackboard eraser, and relates to the technical field of teaching aids. A dust collection sponge is arranged on the surface of a fixed cavity, and the rear end of the fixed cavity is connected with a dust collection box through a dust collection pip...

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Bibliographic Details
Main Author TIAN JINGBING
Format Patent
LanguageEnglish
Published 01.10.2014
Subjects
ACCESSORIES FOR WRITING OR DRAWING
ARTICLES FOR WRITING OR DRAWING UPON
BUREAU ACCESSORIES
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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