| 332811 |
Burning metals and metal products for the trade |
| 332811 |
Cold treating metals for the trade |
| 332811 |
Cryogenic treating metals for the trade |
| 332811 |
Hardening (i.e., heat treating) metals and metal products for the trade |
| 332811 |
Heat treating metals and metal products for the trade |
| 332811 |
Shot peening metal and metal products for the trade |
| 332811 |
Tempering metals and metal products for the trade |
| 332812 |
Aluminum coating of metal products for the trade |
| 332812 |
Bonderizing metal and metal products for the trade |
| 332812 |
Chasing metals and metal products (except printing plates) for the trade |