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Priority to JP1979008232UpriorityCriticalpatent/JPS6137866Y2/ja
Priority to DE8080300237Tprioritypatent/DE3062487D1/de
Priority to EP80300237Aprioritypatent/EP0014101B1/en
Publication of JPS55109141UpublicationCriticalpatent/JPS55109141U/ja
Application grantedgrantedCritical
Publication of JPS6137866Y2publicationCriticalpatent/JPS6137866Y2/ja