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Priority to JP1976133301UpriorityCriticalpatent/JPS5526536Y2/ja
Priority to US05/823,272prioritypatent/US4193385A/en
Publication of JPS5351520UpublicationCriticalpatent/JPS5351520U/ja
Application grantedgrantedCritical
Publication of JPS5526536Y2publicationCriticalpatent/JPS5526536Y2/ja