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Priority to JP5666681UpriorityCriticalpatent/JPH0123672Y2/ja
Priority to US06/274,733prioritypatent/US4409459A/en
Priority to GB8119020Aprioritypatent/GB2078692B/en
Priority to KR1019810002242Aprioritypatent/KR830005963A/ko
Publication of JPS57170892UpublicationCriticalpatent/JPS57170892U/ja
Priority to KR2019850003949Uprioritypatent/KR850001987Y1/ko
Application grantedgrantedCritical
Publication of JPH0123672Y2publicationCriticalpatent/JPH0123672Y2/ja