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Priority claimed from PCT/US1984/000501external-prioritypatent/WO1984004351A1/en
Application filed by Hydril CofiledCriticalHydril Co
Publication of NO845286LpublicationCriticalpatent/NO845286L/no
Publication of NO167225BpublicationCriticalpatent/NO167225B/no
Publication of NO167225CpublicationCriticalpatent/NO167225C/no