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Priority to JP1973047945UpriorityCriticalpatent/JPS5633167Y2/ja
Priority to US05/460,886prioritypatent/US3978375A/en
Priority to DE2418954Aprioritypatent/DE2418954A1/de
Publication of JPS49148462UpublicationCriticalpatent/JPS49148462U/ja
Application grantedgrantedCritical
Publication of JPS5633167Y2publicationCriticalpatent/JPS5633167Y2/ja