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Priority to JP15120076UpriorityCriticalpatent/JPS5369607U/ja
Priority to DE2739419Aprioritypatent/DE2739419C2/de
Priority to GB36846/77Aprioritypatent/GB1591824A/en
Priority to US05/830,345prioritypatent/US4164913A/en
Publication of JPS5369607UpublicationCriticalpatent/JPS5369607U/ja