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Priority to JP15241680UpriorityCriticalpatent/JPS638986Y2/ja
Priority to GB8131660Aprioritypatent/GB2088602B/en
Priority to US06/313,271prioritypatent/US4531050A/en
Priority to KR1019810004035Aprioritypatent/KR830008322A/ko
Publication of JPS5778473UpublicationCriticalpatent/JPS5778473U/ja
Application grantedgrantedCritical
Publication of JPS638986Y2publicationCriticalpatent/JPS638986Y2/ja