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ES22787A1898-06-211898-06-21Perfeccionamientos en aparatos separadores hidráulicos para tratar minerales mixtos y otras sustancias.
ExpiredES22787A1
(es)
Perfeccionamientos introducidos en el procedimiento para tratar minerales y materias que contienen azufre, con el objeto de la extracción de metales y otros constituyentes.
Un procedimiento para obtener blanco de zinc u otros cuerpos análogos directamente de los minerales y de una manera continua merced a un aparato apropiado.