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Priority to JP8771875UpriorityCriticalpatent/JPS5548802Y2/ja
Publication of JPS521999UpublicationCriticalpatent/JPS521999U/ja
Priority to US05/837,038prioritypatent/US4183287A/en
Application grantedgrantedCritical
Publication of JPS5548802Y2publicationCriticalpatent/JPS5548802Y2/ja