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Priority to JP5013676UpriorityCriticalpatent/JPS549811Y2/ja
Priority to DE19772706446prioritypatent/DE2706446A1/de
Publication of JPS52141750UpublicationCriticalpatent/JPS52141750U/ja
Application grantedgrantedCritical
Publication of JPS549811Y2publicationCriticalpatent/JPS549811Y2/ja