Controllable formula blackboard eraser of integration

The utility model provides a controllable formula blackboard eraser of integration, including guide rail, chain chain wheel group and blackboard eraser device to and transmission, be provided with the guide slot on the guide rail, be provided with the rack of cockscomb structure in the guide slot, c...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	DUAN WANGLONG, HAN RUI, JI WENHU, WAN JIANG, CHANG QINGDONG, CHEN PENG, LI YONGLANG, LIU ZHENDONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES FOR WRITING OR DRAWING ARTICLES FOR WRITING OR DRAWING UPON BUREAU ACCESSORIES PERFORMING OPERATIONS TRANSPORTING WRITING OR DRAWING IMPLEMENTS
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