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Sonographic and luminous electrographic device applied to geographical wall maps, anatomical pictures and other graphics for school study. (Machine-translation by Google Translate, not legally binding)
Sonographic and luminous electrographic device applied to geographical wall maps, anatomical pictures and other graphics for school study. (Machine-translation by Google Translate, not legally binding)
A new laminar and sonorous electrographic device applicable to all kinds of geographical wall maps, anatomy and physiology tables and all kinds of graphics intended for school teaching, whether in plan or in relief. (Machine-translation by Google Translate, not legally binding)
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