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ES3843A1883-12-111883-12-11Mejoras en los aparatos para tratar los minerales metálicos por la acción combinada de la electricidad y el agua.
ExpiredES3843A1
(es)
Perfeccionamientos introducidos en el tratamiento de los metales, ya sea para separarlos de sus minerales, para refinarlos, para hacer aleaciones o para otras operaciones análogas.