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Priority to JP9550788UpriorityCriticalpatent/JPH0440582Y2/ja
Priority to KR1019890004418Aprioritypatent/KR910010142B1/ko
Priority to US07/376,023prioritypatent/US4952765A/en
Publication of JPH0218321UpublicationCriticalpatent/JPH0218321U/ja
Application grantedgrantedCritical
Publication of JPH0440582Y2publicationCriticalpatent/JPH0440582Y2/ja
