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Priority to JP1990110648UpriorityCriticalpatent/JPH0749766Y2/ja
Priority to US07/780,498prioritypatent/US5200718A/en
Priority to KR2019910017697Uprioritypatent/KR0117203Y1/ko
Publication of JPH0467314UpublicationCriticalpatent/JPH0467314U/ja
Application grantedgrantedCritical
Publication of JPH0749766Y2publicationCriticalpatent/JPH0749766Y2/ja
