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Application filed by Nii Obschei I Ped PsikhologiifiledCriticalNii Obschei I Ped Psikhologii
Priority to BE761356ApriorityCriticalpatent/BE761356A/fr
Publication of BE761356ApublicationCriticalpatent/BE761356A/fr
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS