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Priority to JP1976012348UpriorityCriticalpatent/JPS5542515Y2/ja
Priority to US05/757,671prioritypatent/US4110690A/en
Publication of JPS52104315UpublicationCriticalpatent/JPS52104315U/ja
Application grantedgrantedCritical
Publication of JPS5542515Y2publicationCriticalpatent/JPS5542515Y2/ja