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 23 Weighing machinery; weighing machine weights of all kinds 84 23 30 Constant weight scales and scales for discharging a predetermined weight of material ... Commodity Code Description 84 23 30 00 Constant weight scales and scales for discharging a predetermined weight of material ...