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Priority to JP18478686UpriorityCriticalpatent/JPH0244703Y2/ja
Priority to US07/107,459prioritypatent/US4815174A/en
Priority to KR2019870017915Uprioritypatent/KR920002503Y1/ko
Publication of JPS6389766UpublicationCriticalpatent/JPS6389766U/ja
Application grantedgrantedCritical
Publication of JPH0244703Y2publicationCriticalpatent/JPH0244703Y2/ja
