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Priority to JP10808970UpriorityCriticalpatent/JPS5027575Y1/ja
Priority to US00191225Aprioritypatent/US3761664A/en
Priority to GB4974671Aprioritypatent/GB1326325A/en
Priority to DE2153266Aprioritypatent/DE2153266C3/de
Publication of JPS5027575Y1publicationCriticalpatent/JPS5027575Y1/ja