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Priority to JP1987059436UpriorityCriticalpatent/JPH0747010Y2/ja
Priority to KR1019880004343Aprioritypatent/KR960003036B1/ko
Publication of JPS63169767UpublicationCriticalpatent/JPS63169767U/ja
Priority to US07/472,459prioritypatent/US4953021A/en
Application grantedgrantedCritical
Publication of JPH0747010Y2publicationCriticalpatent/JPH0747010Y2/ja
