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1. "Juguete magnético", caracterizado en que comprende un cuerpo laminar substancialmente rígido (1) formado por dos caras (2, 3) abatidas una sobre otra, estando dotada la superficie interior de una de dichas dos caras (2) de un disco giratorio (5) provisto de una serie de imanes (7) en forma de figuras o símbolos distribuidos radialmente en dicho disco giratorio (5), y estando provista la otra cara (3) del cuerpo laminar (1) de unos polvos metálicos (8) dispuestos en coincidencia con uno de los citados imanes (7), definiendo dichos polvos metálicos (8) la forma que adopta el imán (7) dispuesto en una posición coincidente con los mismos.
Procedimento per ottenere valori molto bassi di magnetizzazione permanente in getti di metalli aventi bassa permeabilita' magnetica, particolarmente getti di ghisa austenitica e simili