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Priority to JP8872475UpriorityCriticalpatent/JPS5257288Y2/ja
Priority to AU85762/75Aprioritypatent/AU493836B2/en
Publication of JPS524920UpublicationCriticalpatent/JPS524920U/ja
Application grantedgrantedCritical
Publication of JPS5257288Y2publicationCriticalpatent/JPS5257288Y2/ja