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Priority to JP1976048948UpriorityCriticalpatent/JPS5741831Y2/ja
Priority to US05/762,559prioritypatent/US4111091A/en
Publication of JPS52140326UpublicationCriticalpatent/JPS52140326U/ja
Application grantedgrantedCritical
Publication of JPS5741831Y2publicationCriticalpatent/JPS5741831Y2/ja