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Priority to JP12447375UpriorityCriticalpatent/JPS5552371Y2/ja
Priority to US05/698,814prioritypatent/US4084134A/en
Publication of JPS5239180UpublicationCriticalpatent/JPS5239180U/ja
Application grantedgrantedCritical
Publication of JPS5552371Y2publicationCriticalpatent/JPS5552371Y2/ja