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Priority to JP15360080UpriorityCriticalpatent/JPS6344852Y2/ja
Priority to CA000389011Aprioritypatent/CA1174464A/en
Publication of JPS5778086UpublicationCriticalpatent/JPS5778086U/ja
Application grantedgrantedCritical
Publication of JPS6344852Y2publicationCriticalpatent/JPS6344852Y2/ja