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Priority claimed from EP01101778.7Aexternal-prioritypatent/EP1191310B1/en
Application filed by Techem Service AgfiledCriticalTechem Service Ag
Publication of PL349312A1publicationCriticalpatent/PL349312A1/en
Methods and apparatus utilizing a derivative of a fluorescence signal for measuring the characteristics of a multiphase fluid flow in a hydrocarbon well