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Priority claimed from IT49835/74Aexternal-prioritypatent/IT1048280B/it
Application filed by Snam ProgettifiledCriticalSnam Progetti
Publication of NO751004LpublicationCriticalpatent/NO751004L/no
Publication of NO137888BpublicationCriticalpatent/NO137888B/no
Publication of NO137888CpublicationCriticalpatent/NO137888C/no