Circumference ratio demonstrator for mathematics in primary schools

Circumference ratio demonstrator for mathematics in primary schools

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Hauptverfasser: ZHANG RUNXIAN, ZHANG QISHI
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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ZHANG QISHI
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subjects ADVERTISING
APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE
CRYPTOGRAPHY
DIAGRAMS
DISPLAY
EDUCATION
EDUCATIONAL OR DEMONSTRATION APPLIANCES
GLOBES
PHYSICS
PLANETARIA
SEALS
title Circumference ratio demonstrator for mathematics in primary schools
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