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Priority to ES73533ApriorityCriticalpatent/ES73533A2/es
Publication of ES73533A2publicationCriticalpatent/ES73533A2/es
ES73533A1920-04-301920-04-30Un caldera de hogar interno con un haz de tubos de agua dispuesto en el tubo de llama, detrás del puente del hogar.
ExpiredES73533A2
(es)