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Priority to JP1976109473UpriorityCriticalpatent/JPS5534309Y2/ja
Priority to US05/823,272prioritypatent/US4193385A/en
Publication of JPS5326739UpublicationCriticalpatent/JPS5326739U/ja
Application grantedgrantedCritical
Publication of JPS5534309Y2publicationCriticalpatent/JPS5534309Y2/ja