Trigonometric function principle demonstration instrument

The utility model discloses a trigonometric function principle demonstration instrument belongs to mathematics presentation device field, and pivot and the cyclic annular scale homonymy that the chassis was equipped with are equipped with the stand above the pivot, the stand cross section is the rec...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	ZHOU QINGKUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES PHYSICS PLANETARIA SEALS
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