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Priority to JP1976031541UpriorityCriticalpatent/JPS562433Y2/ja
Priority to US05/777,703prioritypatent/US4123781A/en
Publication of JPS52122337UpublicationCriticalpatent/JPS52122337U/ja
Application grantedgrantedCritical
Publication of JPS562433Y2publicationCriticalpatent/JPS562433Y2/ja