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 29 Self-propelled bulldozers, angledozers, graders, levellers, etc 84 29 40 Vibratory smooth drum rollers, with a centrifugal force drum not exceeding 20 t by we 84 29 40 40 Vibratory smooth drum rollers, with a centrifugal force drum not exceeding 20 t by we Commodity Code Description 84 29 40 40 00 Vibratory smooth drum rollers, with a centrifugal force drum not exceeding 20 t by we