55 — Tubes, pipes, iron and steel castings and forgings
| Code | Description |
|---|---|
| 551 | Tubes, pipes and fittings |
| 552 | Iron and steel castings and forgings |
Heading of aggregated item NSTR agregada anglès to which it belongs
13 Metal products
| Code | Description |
|---|---|
| 551 | Tubes, pipes and fittings |
| 552 | Iron and steel castings and forgings |
13 Metal products