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Soc In Accomandita Per Lutilizzazione Delle Invenzioni Ingennieur Beer
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Soc In Accomandita Per Lutilizzazione Delle Invenzioni Ingennieur Beer
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Priority to ES34475ApriorityCriticalpatent/ES34475A1/en
Publication of ES34475A1publicationCriticalpatent/ES34475A1/en
An electrical system that allows the change of voice signals between the locomotives in motion and the stations, stopping places, and between the locomotives themselves in order to avoid collisions of the trains on the iron roads.