| section 17 | Vehicles, aircraft, vessels and associated transport equipment |
| chapter 86 | Railway or tramway locomotives, rolling-stock and parts thereof; railway or tramway track fixtures and fittings and parts thereof; mechanical (including electro-mechanical) traffic signalling equipment of all kinds |
| 86.07 | Parts of railway or tramway locomotives or rolling-stock: |
| －Brakes and parts thereof: |
| 8607.21 | －－Air brakes and parts thereof |