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Priority claimed from FR8413440Aexternal-prioritypatent/FR2569736B1/en
Application filed by France Etat Ponts ChausseesfiledCriticalFrance Etat Ponts Chaussees
Priority claimed from FR8512830Aexternal-prioritypatent/FR2586722B2/en
Priority claimed from EP85904258Aexternal-prioritypatent/EP0191081B1/en
Application grantedgrantedCritical
Publication of ATE49617T1publicationCriticalpatent/ATE49617T1/en