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Priority claimed from ZA19865612Aexternal-prioritypatent/ZA865612B/en
Application filed by De Beers Ind DiamondfiledCriticalDe Beers Ind Diamond
Priority to ZA875217ApriorityCriticalpatent/ZA875217B/en
Publication of ZA875217BpublicationCriticalpatent/ZA875217B/en