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Priority to JP9371480UpriorityCriticalpatent/JPS6329367Y2/ja
Priority to GB8112637Aprioritypatent/GB2079122B/en
Priority to IN477/CAL/81Aprioritypatent/IN154659B/en
Publication of JPS5718307UpublicationCriticalpatent/JPS5718307U/ja
Application grantedgrantedCritical
Publication of JPS6329367Y2publicationCriticalpatent/JPS6329367Y2/ja