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Priority to JP9774187UpriorityCriticalpatent/JPS642518U/ja
Priority to GB8813933Aprioritypatent/GB2206458B/en
Priority to DE19883821420prioritypatent/DE3821420A1/de
Priority to FR8808551Aprioritypatent/FR2617342B1/fr
Publication of JPS642518UpublicationCriticalpatent/JPS642518U/ja