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 85 Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles 85 40 Thermionic, cold cathode or photocathode valves and tubes.... 85 40 72 Klystrons Commodity Code Description 85 40 72 00 Klystrons