Prevent blackboard reflex reflector

The utility model provides a prevent blackboard reflex reflector relates to the teaching aid field, prevent blackboard reflex reflector includes fixing support, swivel mount, inclined to one side vibration -damping sheet support frame and two inclined to one side vibration -damping sheet, two inclin...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Liu Guotao, Xie Zongqi
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES FOR WRITING OR DRAWING ARTICLES FOR WRITING OR DRAWING UPON BUREAU ACCESSORIES OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS TRANSPORTING WRITING OR DRAWING IMPLEMENTS
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