Chalk cover

The utility model discloses a chalk sleeve which can prevent a chalk from contaminating the fingers of a teacher and belongs to the teaching appliances. The sleeve is in screw connection with a rotary rod with an anti-slip head in one end of the sleeve and is longitudinally provided with an open sli...

Ausführliche Beschreibung

Bibliographische Detailangaben

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