Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 55 Metal-rolling mills and rolls therefor Commodity Code Description 84 55 10 - Tube mills 84 55 21 - - Hot or combination hot and cold 84 55 22 - - Cold 84 55 30 - Rolls for rolling mills 84 55 90 - Other parts