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Priority to JP4096772UpriorityCriticalpatent/JPS5235618Y2/ja
Priority to US348223Aprioritypatent/US3861744A/en
Publication of JPS492026UpublicationCriticalpatent/JPS492026U/ja
Application grantedgrantedCritical
Publication of JPS5235618Y2publicationCriticalpatent/JPS5235618Y2/ja