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Priority to JP1677479UpriorityCriticalpatent/JPS55117369U/ja
Priority to PCT/JP1980/000020prioritypatent/WO1980001672A1/ja
Priority to US06/194,831prioritypatent/US4379582A/en
Publication of JPS55117369UpublicationCriticalpatent/JPS55117369U/ja