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G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
G09B29/12—Relief maps
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FR509483A1919-02-101920-02-06Perfectionnements apportés aux appareils de pédagogie et autres dispositifs analogues
ExpiredFR509483A
(fr)