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 56 Machine-tools for working any material by removal of material, by laser or other light or photon beam, ultrasonic, electro-discharge, electro-chemical, electron beam, ionic-beam or plasma arc processes; water-jet cutting machines. Commodity Code Description 84 56 11 Operated by laser 84 56 12 Operated by other light or photon beam processes 84 56 20 Operated by ultrasonic processes 84 56 30 Operated by electro-discharge processes 84 56 40 Operated by plasma arc processes 84 56 50 Water-jet cutting machines 84 56 90 Other