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Priority to JP1981020112UpriorityCriticalpatent/JPS6224310Y2/ja
Priority to US06/344,690prioritypatent/US4418603A/en
Priority to CH991/82Aprioritypatent/CH654131A5/de
Publication of JPS57136989UpublicationCriticalpatent/JPS57136989U/ja
Application grantedgrantedCritical
Publication of JPS6224310Y2publicationCriticalpatent/JPS6224310Y2/ja