Section 16 MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THERE OF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORD ERS AND REPRODUCERS, AND PARTS AND ACCESSORIES OF SUCH ARTICLES 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 04 Auxiliary plant for use with boilers of heading 84.02 or 84.03 (for example, eco 84 04 10 84 04 10 00 Commodity Code Description 84 04 10 00 00 - Auxiliary plant for use with boilers of heading 84.02 or 84.03 84 04 20 00 00 - Condensers for steam or other vapour power units 84 04 90 00 00 - Parts