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Priority to JP19358586UpriorityCriticalpatent/JPH0525687Y2/ja
Priority to US07/109,463prioritypatent/US4764189A/en
Priority to KR1019870011705Aprioritypatent/KR900003680B1/ko
Publication of JPS6398718UpublicationCriticalpatent/JPS6398718U/ja
Application grantedgrantedCritical
Publication of JPH0525687Y2publicationCriticalpatent/JPH0525687Y2/ja
