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Priority to JP1975098562UpriorityCriticalpatent/JPS559107Y2/ja
Priority to US05/704,816prioritypatent/US4070784A/en
Priority to CA256,979Aprioritypatent/CA1064877A/en
Publication of JPS5214188UpublicationCriticalpatent/JPS5214188U/ja
Application grantedgrantedCritical
Publication of JPS559107Y2publicationCriticalpatent/JPS559107Y2/ja