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Priority to JP1972091217UpriorityCriticalpatent/JPS5143029Y2/ja
Priority to US384193Aprioritypatent/US3871358A/en
Publication of JPS4948994UpublicationCriticalpatent/JPS4948994U/ja
Application grantedgrantedCritical
Publication of JPS5143029Y2publicationCriticalpatent/JPS5143029Y2/ja