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 60 Machine-tools for deburring, sharpening, grinding, honing, lapping, polishing or 84 60 23 Other cylindrical grinding machines, numerically controlled 84 60 23 00 Other cylindrical grinding machines, numerically controlled Commodity Code Description 84 60 23 00 00 Other cylindrical grinding machines, numerically controlled