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Individual
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Individual
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Priority to ES122234UpriorityCriticalpatent/ES122234Y/en
Publication of ES122234UpublicationCriticalpatent/ES122234U/en
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Publication of ES122234YpublicationCriticalpatent/ES122234Y/en
Manual educational piece characterized essentially by the fact of being constituted by a plate of molded material of preferably elongated rectangular shape provided on its longitudinal edges with open grooves equidistant from each other operatively arranged to realize fitting in similar grooves of other identical pieces. (Machine-translation by Google Translate, not legally binding)