| 212115 |
Coal, bituminous or anthracite, underground mining |
| 212115 |
Hard coal (i.e., anthracite) underground mining |
| 212115 |
Semianthracite underground mining |
| 212115 |
Semibituminous coal underground mining |
| 212115 |
Subbituminous coal underground mining |
| 212210 |
Agglomerates, iron ore, beneficiating |
| 212210 |
Briquets, iron, mining and/or beneficiating |
| 212210 |
Brown ore mining and/or beneficiating |
| 212210 |
Hematite mining and/or beneficiating |
| 212210 |
Iron ore (e.g., hematite, magnetite, siderite, taconite) mining and/or beneficiating |