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Priority to JP1592972UpriorityCriticalpatent/JPS5350441Y2/ja
Priority to GB588073Aprioritypatent/GB1405550A/en
Priority to DE19732306991prioritypatent/DE2306991A1/de
Publication of JPS4892938UpublicationCriticalpatent/JPS4892938U/ja
Application grantedgrantedCritical
Publication of JPS5350441Y2publicationCriticalpatent/JPS5350441Y2/ja