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Absous Ernest
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Absous Ernest
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Priority to ES6929ApriorityCriticalpatent/ES6929A1/es
Publication of ES6929A1publicationCriticalpatent/ES6929A1/es
Un procedimiento mecánico para mejorar los sistemas de ferrocarriles que marchan por la acción de la gravedad conocidos con el nombre de Montañas rusas.