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ES4358A1884-07-141884-07-14Perfeccionamientos en los aparatos que se emplean para la fabricación de gas para el alumbrado y la calefacción.
ExpiredES4358A1
(es)
Mejoras en los aparatos destinados a la producción y distribución de los gases y vapores empleados para fines de calefacción, de iluminación o de otra clase y, en los que se emplean para la combustión de los dichos gases o vapores aplicables también a la