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 83 AND SHAFT COUPLINGS (INCLUDING UNIVERSAL JOINTS). 84 83 90 OTHER TOOTHED WHEELS/CHAIN SPROCKETS/OTH TRANSM. ELEMENTS PRESENTED SEPARATELY; PARTS 84 83 90 99 OTHER TOOTHED WHEELS/CHAIN SPROCKETS/OTH TRANSM. ELEMENTS PRESENTED SEPARATELY; PARTS Commodity Code Description 84 83 90 99 000 OTHER TOOTHED WHEELS/CHAIN SPROCKETS/OTH TRANSM. ELEMENTS PRESENTED SEPARATELY; PARTS