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Priority to JP1976040621UpriorityCriticalpatent/JPS5619812Y2/ja
Priority to US05/778,364prioritypatent/US4074025A/en
Publication of JPS52133926UpublicationCriticalpatent/JPS52133926U/ja
Application grantedgrantedCritical
Publication of JPS5619812Y2publicationCriticalpatent/JPS5619812Y2/ja