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Individual
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Individual
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Priority to ES29040ApriorityCriticalpatent/ES29040A1/es
Publication of ES29040A1publicationCriticalpatent/ES29040A1/es
Un indicador de alarma por sonido para coches de ferrocarriles que estén provistos de frenos automáticos por el vacío, sistema "Amunategui" que constituye un procedimiento mecánico.