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Priority to JP1980150971UpriorityCriticalpatent/JPH0423223Y2/ja
Priority to US06/242,886prioritypatent/US4370551A/en
Priority to DE19813110296prioritypatent/DE3110296A1/de
Publication of JPS5774423UpublicationCriticalpatent/JPS5774423U/ja
Application grantedgrantedCritical
Publication of JPH0423223Y2publicationCriticalpatent/JPH0423223Y2/ja