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ES13755A1892-07-221892-07-22Un procedimiento para dar un baño de barniz especial para el papel común que se usa en la confección de cigarrillos.
ExpiredES13755A2
(es)
Un procedimiento para rectificar, o sea desinfectar, decolorar y clarificar los aceites procedentes de la destilación seca de la resina colofonia, vulgarmente conocidos con el nombre de aceites de resina.