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Priority claimed from AT752972Aexternal-prioritypatent/AT327871B/en
Application filed by Snam ProgettifiledCriticalSnam Progetti
Priority to AT300474ApriorityCriticalpatent/AT333710B/en
Publication of ATA300474ApublicationCriticalpatent/ATA300474A/en
Application grantedgrantedCritical
Publication of AT333710BpublicationCriticalpatent/AT333710B/en