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Priority to JP1980060146UpriorityCriticalpatent/JPS626997Y2/ja
Priority to GB8104886Aprioritypatent/GB2072775B/en
Priority to US06/234,758prioritypatent/US4369862A/en
Publication of JPS56162308UpublicationCriticalpatent/JPS56162308U/ja
Application grantedgrantedCritical
Publication of JPS626997Y2publicationCriticalpatent/JPS626997Y2/ja