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Publication of BE711779ApublicationCriticalpatent/BE711779A/fr
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B1/00—Manually or mechanically operated educational appliances using elements forming, or bearing, symbols, signs, pictures, or the like which are arranged or adapted to be arranged in one or more particular ways
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Engineering & Computer Science
(AREA)
Business, Economics & Management
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Physics & Mathematics
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Educational Administration
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Educational Technology
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General Physics & Mathematics
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Theoretical Computer Science
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Diaphragms For Electromechanical Transducers
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Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation
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Financial Or Insurance-Related Operations Such As Payment And Settlement
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