Code 8421 39

OTHER APPARATUS FOR FILTERING OR PURIFYING GASES

SECTION XVI. 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

8421 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases:

filtering or purifying machinery and apparatus for gases:

8421 39 other:

8421 39 200 intake air filters for internal combustion engines:

machinery and apparatus for filtering or cleaning other gases:

8421 39 600 0 by a catalytic process

8421 39 800 other: