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Priority to JP1976038545UpriorityCriticalpatent/JPS564487Y2/ja
Priority to CA275,136Aprioritypatent/CA1044128A/en
Publication of JPS52130804UpublicationCriticalpatent/JPS52130804U/ja
Application grantedgrantedCritical
Publication of JPS564487Y2publicationCriticalpatent/JPS564487Y2/ja