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Priority to JP1976026616UpriorityCriticalpatent/JPS554070Y2/ja
Priority to US05/771,274prioritypatent/US4120785A/en
Publication of JPS52118280UpublicationCriticalpatent/JPS52118280U/ja
Application grantedgrantedCritical
Publication of JPS554070Y2publicationCriticalpatent/JPS554070Y2/ja