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Priority to JP1989074585UpriorityCriticalpatent/JPH0639585Y2/ja
Priority to KR2019900005860Uprioritypatent/KR940008259Y1/ko
Publication of JPH0312758UpublicationCriticalpatent/JPH0312758U/ja
Priority to US07/709,787prioritypatent/US5125594A/en
Application grantedgrantedCritical
Publication of JPH0639585Y2publicationCriticalpatent/JPH0639585Y2/ja
