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ES14721A1893-06-221893-06-22Mejoras en los aparatos destinados a regular el escape de los gases calientes que salen de las calderas tubulares.
ExpiredES14721A1
(es)
Una disposición para producir la calefacción simultánea del aire comburente y del agua de alimentación, por medio de los gases que salen de los tubos o de los conductos de las calderas de vapor.