Multifunctional ruler for mathematical teaching

Relating to the technical field of teaching articles, the utility model provides a multifunctional ruler for mathematical teaching. The multifunctional ruler comprises a baseplate with a rectangular structure. The inside of the baseplate is provided with an annular ruler with a hollow structure. An...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	ZANG JINLING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES FOR WRITING OR DRAWING ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE ARTICLES FOR WRITING OR DRAWING UPON BUREAU ACCESSORIES CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES PERFORMING OPERATIONS PHYSICS PLANETARIA SEALS TRANSPORTING WRITING OR DRAWING IMPLEMENTS
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