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Priority to ES9124ApriorityCriticalpatent/ES9124A1/es
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ES9124A1889-01-151889-01-15Mejoras en el procedimiento de extracción de metales de gangas refractarias compuestas ó de otras clases.
ExpiredES9124A1
(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.