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 21 Centrifuges; filtering/purifying machinery... for liquids or gases 84 21 99 Oher : Of goods of subheading 8421.23.19 or 8421.23.99 84 21 99 97 Oher : Of goods of subheading 8421.23.19 or 8421.23.99 Commodity Code Description 84 21 99 97 00 Other : Of goods of subheading 8421.23.19 or 8421.23.99