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ES18505A1896-01-041896-01-04Mejoras en aparatos para la concentración, cribado o clasificación de mineral machacado y otras materias.
ExpiredES18505A1
(es)
Mejoras en los aparatos separadores de materiales húmedos y de corriente ascendente para trabajar metales, minerales, piedras preciosas u otros minerales y sustancias.
Improvements in "Middlings" Purifiers or Machines for Separating "Middlings," Semolina, and like Materials in the Manufacture of Flour.