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Individual
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Individual
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Priority to ES82569ApriorityCriticalpatent/ES82569A1/es
Publication of ES82569A1publicationCriticalpatent/ES82569A1/es
ES82569A1922-08-101922-08-10Perfeccionamiento en los enfriaderos del clinker empleados en la fabricación del cemento Pórtland artificial.
ExpiredES82569A1
(es)