| 212390 |
Umber mining and/or beneficiating |
| 212390 |
Vermiculite mining and/or beneficiating |
| 212390 |
Volcanic ash mining and/or beneficiating |
| 212390 |
Whetstones mining and/or beneficiating |
| 212390 |
Wollastonite mining and/or beneficiating |
| 212390 |
Wurtzilite mining and/or beneficiating |
| 213111 |
Directional drilling of oil and gas wells on a contract basis |
| 213111 |
Drilling directional oil and gas field wells on a contract basis |
| 213111 |
Drilling for gas on a contract basis |
| 213111 |
Drilling for oil on a contract basis |