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Priority to JP2704476UpriorityCriticalpatent/JPS5758406Y2/ja
Priority to ZA00771345Aprioritypatent/ZA771345B/xx
Publication of JPS52118883UpublicationCriticalpatent/JPS52118883U/ja
Application grantedgrantedCritical
Publication of JPS5758406Y2publicationCriticalpatent/JPS5758406Y2/ja