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Priority to JP1980069637UpriorityCriticalpatent/JPS6241427Y2/ja
Priority to US06/266,389prioritypatent/US4438468A/en
Publication of JPS56170575UpublicationCriticalpatent/JPS56170575U/ja
Application grantedgrantedCritical
Publication of JPS6241427Y2publicationCriticalpatent/JPS6241427Y2/ja