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Priority to JP1987086144UpriorityCriticalpatent/JPS63195196U/ja
Priority to US07/072,925prioritypatent/US4775170A/en
Priority to KR1019870008148Aprioritypatent/KR920002319B1/ko
Publication of JPS63195196UpublicationCriticalpatent/JPS63195196U/ja