| 212290 |
Ferroalloy ores (e.g., chromium, columbium, molybdenum, tungsten) mining and/or beneficiating |
| 212290 |
Hafnium mining and/or beneficiating |
| 212290 |
Huebnerite mining and/or beneficiating |
| 212290 |
Ilmenite ores mining and/or beneficiating |
| 212290 |
Iridium mining and/or beneficiating |
| 212290 |
Leaching of uranium, radium, or vanadium ores |
| 212290 |
Manganese concentrates beneficiating |
| 212290 |
Manganese ores mining and/or beneficiating |
| 212290 |
Manganiferous ores (not valued for iron content) mining and/or beneficiating |
| 212290 |
Manganite mining and/or beneficiating |