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Priority to JP1980166517UpriorityCriticalpatent/JPS6212608Y2/ja
Priority to GB8134469Aprioritypatent/GB2087800B/en
Priority to US06/323,008prioritypatent/US4450454A/en
Publication of JPS5788554UpublicationCriticalpatent/JPS5788554U/ja
Application grantedgrantedCritical
Publication of JPS6212608Y2publicationCriticalpatent/JPS6212608Y2/ja