Eurostat, Luxembourg. 84834021 (01/2006-..) Spur and helical gears and gearing, for machinery (excl. friction gears, gear boxes and other speed changers): CN 84834021 /Exports /Unit = Prices (Euro/ton) /Partner: Tanzania /Reporter: Eur27_2020 /84834021:Spur and Helical Gears and Gearing, for Machinery (Excl. Friction Gears, Gear Boxes and Other Speed Changers).