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 79 Machines and mechanical appliances, having individual functions, nes 84 79 89 Machinery for assembling central processing unit (CPU) daughter boards in plastic cas 84 79 89 20 Machinery for assembling central processing unit (CPU) daughter boards in plastic cas Commodity Code Description 84 79 89 20 00 Machinery for assembling central processing unit (CPU) daughter boards in plastic cas