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Priority to JP1978101437UpriorityCriticalpatent/JPS5635207Y2/ja
Priority to US06/050,618prioritypatent/US4306973A/en
Priority to DE2926434Aprioritypatent/DE2926434C2/de
Publication of JPS5521014UpublicationCriticalpatent/JPS5521014U/ja
Application grantedgrantedCritical
Publication of JPS5635207Y2publicationCriticalpatent/JPS5635207Y2/ja