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Priority to JP1985023929UpriorityCriticalpatent/JPH048020Y2/ja
Priority to US06/831,214prioritypatent/US4676332A/en
Priority to GB08604317Aprioritypatent/GB2172688B/en
Publication of JPS61139819UpublicationCriticalpatent/JPS61139819U/ja
Application grantedgrantedCritical
Publication of JPH048020Y2publicationCriticalpatent/JPH048020Y2/ja
