Eurostat, Luxembourg. 81129131 (01/1988-12/2001) Unwrought niobium `columbium` and rhenium, niobium `columbium` and rhenium powders: CN 81129131 /Exports /Unit = Quantities in tons /Partner: Secret Countries /Reporter: European Union /81129131:Niobium 'columbium' and Rhenium, Unwrought; Powders of Niobium 'columbium' and Rhenium.