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Priority to ES1983271657UpriorityCriticalpatent/ES271657Y/en
Publication of ES271657UpublicationCriticalpatent/ES271657U/en
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Publication of ES271657YpublicationCriticalpatent/ES271657Y/en
Improved educational support for children, characterized by the immovable overlapping arrangement of two plates, upper and lower, the upper one being provided with a series of holes with visual access to a groove of rectangular section and wide depth, defined in the space included in the confrontation of the faces corresponding to each plate and having access to it by only one of the lateral faces defined in the superposition of said plates, it is possible to visualize, by situating in each of the holes a rectangular cursor, of surface half of the hole in which it is contained, selectable sectors of the total section of each hole. (Machine-translation by Google Translate, not legally binding)