- 84Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- 8483Transmission shafts (including cam shafts and crank shafts) and cranks; bearing housings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints)
- 8483.90Toothed wheels, chain sprockets and other transmission elements presented separately; parts
8483.90.00.20Ball nut assemblies, "J" balls and ball screw assemblies, for fueling machines for nuclear energy; Toothed wheels; For use in the manufacture of the goods of this heading; Of transmission shafts and cranks, including cam shafts and crank shafts
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