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Priority to JP1984187892UpriorityCriticalpatent/JPH0247017Y2/ja
Priority to US06/797,250prioritypatent/US4757760A/en
Publication of JPS61102531UpublicationCriticalpatent/JPS61102531U/ja
Application grantedgrantedCritical
Publication of JPH0247017Y2publicationCriticalpatent/JPH0247017Y2/ja
