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Priority to JP12260376UpriorityCriticalpatent/JPS5428175Y2/ja
Priority to CA287,223Aprioritypatent/CA1056425A/en
Publication of JPS5340806UpublicationCriticalpatent/JPS5340806U/ja
Application grantedgrantedCritical
Publication of JPS5428175Y2publicationCriticalpatent/JPS5428175Y2/ja