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Priority to JP1977062823UpriorityCriticalpatent/JPS5628978Y2/ja
Priority to US05/902,864prioritypatent/US4249533A/en
Priority to DE2821265Aprioritypatent/DE2821265C3/de
Publication of JPS53157584UpublicationCriticalpatent/JPS53157584U/ja
Application grantedgrantedCritical
Publication of JPS5628978Y2publicationCriticalpatent/JPS5628978Y2/ja