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Priority to GR600121067ApriorityCriticalpatent/GR21067B/en
Publication of GR21067BpublicationCriticalpatent/GR21067B/en
GR600121067A1960-07-071960-07-07
AUTOMATIC MECHANISM FOR EARLY WARNING OF DRIVERS WITHOUT THE CROSSINGS OF HIGHWAYS AND RAILWAYS DURING THE CROSSING.
GR21067B
(en)