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Priority claimed from SE8702836Aexternal-prioritypatent/SE457883B/en
Application filed by O Hallberg Rolf, Edvardsson UlffiledCriticalO Hallberg Rolf
Priority to ZA89156ApriorityCriticalpatent/ZA89156B/en
Publication of ZA89156BpublicationCriticalpatent/ZA89156B/en