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Priority to JP1980125010UpriorityCriticalpatent/JPS6315561Y2/ja
Priority to US06/232,175prioritypatent/US4409947A/en
Priority to DE19813104437prioritypatent/DE3104437A1/de
Publication of JPS5749536UpublicationCriticalpatent/JPS5749536U/ja
Application grantedgrantedCritical
Publication of JPS6315561Y2publicationCriticalpatent/JPS6315561Y2/ja