| 332312 |
Landing mats, aircraft, metal, manufacturing |
| 332312 |
Radio and television tower sections, fabricated structural metal, manufacturing |
| 332312 |
Railway bridge sections, prefabricated metal, manufacturing |
| 332312 |
Ship sections, prefabricated metal, manufacturing |
| 332312 |
Steel joists manufacturing |
| 332312 |
Steel railroad car racks manufacturing |
| 332312 |
Structural steel, fabricated, manufacturing |
| 332312 |
Television tower sections, fabricated structural metal, manufacturing |
| 332312 |
Transmission tower sections, fabricated structural metal, manufacturing |
| 332313 |
Airlocks, fabricated metal plate work, manufacturing |