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Priority to JP1979161878UpriorityCriticalpatent/JPS6145642Y2/ja
Priority to US06/200,064prioritypatent/US4320534A/en
Publication of JPS5679021UpublicationCriticalpatent/JPS5679021U/ja
Application grantedgrantedCritical
Publication of JPS6145642Y2publicationCriticalpatent/JPS6145642Y2/ja