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Priority to JP2236673UpriorityCriticalpatent/JPS49125728U/ja
Priority to US05/442,198prioritypatent/US3987485A/en
Priority to DE19742407669prioritypatent/DE2407669A1/de
Priority to GB763274Aprioritypatent/GB1468551A/en
Publication of JPS49125728UpublicationCriticalpatent/JPS49125728U/ja