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Priority to JP1979093698UpriorityCriticalpatent/JPS6337818Y2/ja
Priority to DE19803009989prioritypatent/DE3009989A1/de
Priority to US06/131,673prioritypatent/US4328937A/en
Publication of JPS5610377UpublicationCriticalpatent/JPS5610377U/ja
Application grantedgrantedCritical
Publication of JPS6337818Y2publicationCriticalpatent/JPS6337818Y2/ja