| 327120 |
Castable refractories, nonclay, manufacturing |
| 327120 |
Cement, clay refractory, manufacturing |
| 327120 |
Ceramic tiles, floor and wall, manufacturing |
| 327120 |
Clay refractories (e.g., mortar, brick, tile, block) manufacturing |
| 327120 |
Conduit, vitrified clay, manufacturing |
| 327120 |
Coping, wall, clay, manufacturing |
| 327120 |
Crucibles, fire clay, manufacturing |
| 327120 |
Crucibles, graphite, magnesite, chrome, silica, or other nonclay materials, manufacturing |
| 327120 |
Drain tile, clay, manufacturing |
| 327120 |
Firebrick, clay refractories, manufacturing |