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Priority claimed from GB1230671Aexternal-prioritypatent/GB1393887A/en
Application filed by Smiths Industries LtdfiledCriticalSmiths Industries Ltd
Publication of DK145360BpublicationCriticalpatent/DK145360B/en
Application grantedgrantedCritical
Publication of DK145360CpublicationCriticalpatent/DK145360C/en