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Priority to JP1977053281UpriorityCriticalpatent/JPS5616576Y2/ja
Priority to DE19787812945Uprioritypatent/DE7812945U1/de
Publication of JPS53148637UpublicationCriticalpatent/JPS53148637U/ja
Application grantedgrantedCritical
Publication of JPS5616576Y2publicationCriticalpatent/JPS5616576Y2/ja