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 57 Machining centres, unit construction machines (single station) and multi-station transfer machines, for working metal Commodity Code Description 84 57 10 - Machining centers 84 57 20 - Unit construction machines (single stations) 84 57 30 - Multi-station transfer machines