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ES10431A1890-01-181890-01-18Mejoras en los aparatos que se emplean para calentar y purificar el agua de alimentación de las calderas de vapor.
ExpiredES10431A1
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Un procedimiento industrial que consiste en situar en el interior de toda chimenea de los hogares de las máquinas de vapor "un aparato-depósito" de agua denominado "Gracia" para obtener la purificación del agua destinada a la alimentación de las calderas