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Una pizarra, perfeccionada, caracterizada por un marco dotado de cajeados laterales en los cuales se disponen acopladas letras o piezas geométricas provistas de elementos magnéticos que establecen su anclaje sobre una cara de la pizarra dotada de un cajetín paracentral, estando la cara opuesta de esta última constituida por un encerado clásico sobre el que se puede escribir.