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Individual
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Individual
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Priority to ES68932ApriorityCriticalpatent/ES68932A1/es
Publication of ES68932A1publicationCriticalpatent/ES68932A1/es
ES68932A1919-02-031919-02-03Un procedimiento perfeccionado para la extracción del plomo y del cinc metálicos de los minerales que los contienen.
ExpiredES68932A1
(es)