| Naics index | Naics index description |
|---|---|
| 212230 | Copper beneficiating plants |
| 212230 | Copper ore concentrates recovery |
| 212230 | Copper ore mine site development for own account |
| 212230 | Copper ores mining and/or beneficiating |
| 212230 | Copper-water precipitates |
| 212230 | Cuprite mining and/or beneficiating |
| 212230 | Galena mining and/or beneficiating |
| 212230 | Lead ore mine site development for own account |
| 212230 | Lead ore mining and/or beneficiating |
| 212230 | Lead-zinc ore mining and/or beneficiating |