| 331511 |
Soil pipe, cast iron, manufacturing |
| 331511 |
Water pipe, cast iron, manufacturing |
| 331512 |
Foundries, steel investment |
| 331512 |
Investment castings, steel, unfinished, manufacturing |
| 331512 |
Steel investment castings, unfinished, manufacturing |
| 331512 |
Steel investment foundries |
| 331513 |
Alloy steel castings (except investment), unfinished, manufacturing |
| 331513 |
Cast steel railroad car wheels, unfinished, manufacturing |
| 331513 |
Castings, steel (except investment), unfinished, manufacturing |
| 331513 |
Foundries, steel (except investment) |