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 60 Machine-tools for deburring, sharpening, grinding, honing, etc, metal 84 60 31 Sharpening (tool or cutter grinding) machines, numerically controlled Commodity Code Description 84 60 31 00 Sharpening (tool or cutter grinding) machines, numerically controlled 84 60 31 10 Machine tools, numerically controlled, for sharpening carbide drilling bits with a sh 84 60 31 90 Other