| Naics index | Naics index description |
|---|---|
| 327331 | Prestressed concrete blocks or bricks manufacturing |
| 327331 | Slumped brick manufacturing |
| 327332 | Conduits, concrete, manufacturing |
| 327332 | Culvert pipe, concrete, manufacturing |
| 327332 | Cylinder pipe, prestressed concrete, manufacturing |
| 327332 | Irrigation pipe, concrete, manufacturing |
| 327332 | Pipe, concrete, manufacturing |
| 327332 | Precast concrete pipe manufacturing |
| 327332 | Pressure pipe, reinforced concrete, manufacturing |
| 327332 | Prestressed concrete pipes manufacturing |