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ES47A1878-09-281878-09-28Construcción de un cilindro dispuesto con sierras circulares y suplementos de hierro dulce para pulverizar el corcho.
ExpiredES47A1
(es)
Un trillo de engranaje para multiplicar la marca con cilindros convergentes y divergentes para facilitar la rotación circular que se efectúa en la operación de trilla.