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Priority to JP4409779UpriorityCriticalpatent/JPS6018702Y2/ja
Priority to US06/136,826prioritypatent/US4339109A/en
Publication of JPS55144274UpublicationCriticalpatent/JPS55144274U/ja
Application grantedgrantedCritical
Publication of JPS6018702Y2publicationCriticalpatent/JPS6018702Y2/ja