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Priority to JP1315085UpriorityCriticalpatent/JPH0429393Y2/ja
Priority to US06/823,341prioritypatent/US4681513A/en
Priority to GB8604418Aprioritypatent/GB2189555B/en
Publication of JPS61131644UpublicationCriticalpatent/JPS61131644U/ja
Application grantedgrantedCritical
Publication of JPH0429393Y2publicationCriticalpatent/JPH0429393Y2/ja