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Priority to JP1975144248UpriorityCriticalpatent/JPS5427161Y2/ja
Priority to US05/688,953prioritypatent/US4046289A/en
Publication of JPS5257374UpublicationCriticalpatent/JPS5257374U/ja
Application grantedgrantedCritical
Publication of JPS5427161Y2publicationCriticalpatent/JPS5427161Y2/ja