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Priority to JP1489072UpriorityCriticalpatent/JPS4891864U/ja
Priority to FR7304126Aprioritypatent/FR2171181B1/fr
Priority to IT2008073Aprioritypatent/IT978853B/it
Priority to DE19732306014prioritypatent/DE2306014A1/de
Publication of JPS4891864UpublicationCriticalpatent/JPS4891864U/ja