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Priority to JP1977041327UpriorityCriticalpatent/JPS6315866Y2/ja
Priority to US05/859,011prioritypatent/US4189222A/en
Priority to DE2803034Aprioritypatent/DE2803034C3/de
Publication of JPS53136134UpublicationCriticalpatent/JPS53136134U/ja
Application grantedgrantedCritical
Publication of JPS6315866Y2publicationCriticalpatent/JPS6315866Y2/ja