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Priority to ES206959ApriorityCriticalpatent/ES206959A1/es
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Un dispositivo para la regulacion automatica del almohadon de aire en calderas de presion, especialmente para calderas de presion de aceite con elevada presion de servicio
Improvements in and relating to the utilisation of exhaust steam for the creation ofdraught required for the combustion of fuel in steam or like power plant