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Priority to JP5178779UpriorityCriticalpatent/JPS638907Y2/ja
Priority to US06/138,780prioritypatent/US4316669A/en
Priority to DE19803014840prioritypatent/DE3014840A1/de
Publication of JPS55152541UpublicationCriticalpatent/JPS55152541U/ja
Application grantedgrantedCritical
Publication of JPS638907Y2publicationCriticalpatent/JPS638907Y2/ja