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Priority to JP1977004403UpriorityCriticalpatent/JPS5720163Y2/ja
Priority to DE2800661Aprioritypatent/DE2800661C2/de
Publication of JPS53100777UpublicationCriticalpatent/JPS53100777U/ja
Application grantedgrantedCritical
Publication of JPS5720163Y2publicationCriticalpatent/JPS5720163Y2/ja