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Priority to JP1977062824UpriorityCriticalpatent/JPS574967Y2/ja
Priority to US05/902,841prioritypatent/US4240431A/en
Priority to DE2821264Aprioritypatent/DE2821264C3/de
Publication of JPS53157585UpublicationCriticalpatent/JPS53157585U/ja
Application grantedgrantedCritical
Publication of JPS574967Y2publicationCriticalpatent/JPS574967Y2/ja