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Priority claimed from IT21249/72Aexternal-prioritypatent/IT949753B/en
Application filed by Snam ProgettifiledCriticalSnam Progetti
Priority to AT567974ApriorityCriticalpatent/AT332858B/en
Publication of ATA567974ApublicationCriticalpatent/ATA567974A/en
Application grantedgrantedCritical
Publication of AT332858BpublicationCriticalpatent/AT332858B/en