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Priority to JP16662380UpriorityCriticalpatent/JPS6110191Y2/ja
Priority to DE8181109718Tprioritypatent/DE3174346D1/de
Priority to EP81109718Aprioritypatent/EP0052369B1/en
Publication of JPS5788041UpublicationCriticalpatent/JPS5788041U/ja
Application grantedgrantedCritical
Publication of JPS6110191Y2publicationCriticalpatent/JPS6110191Y2/ja