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Priority to ES30147ApriorityCriticalpatent/ES30147A1/es
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ES30147A1902-07-301902-07-30Un nuevo resultado industrial consistente en enlaces inoxidables para traviesas y carriles de todas las clases.
ExpiredES30147A1
(es)
Un nuevo tratamiento para la extracción del azufre y de los cianuros contenidos en las materias de purificación del gas del alumbrado por medio del aparato que se describe.