| 06100 | Bituminous or oil shale and sand extraction |
| 06100 | Crude oil extraction |
| 06100 | Crude oils obtained by decantation processes |
| 06100 | Crude oils obtained by dehydration processes |
| 06100 | Crude oils obtained by desalting processes |
| 06100 | Crude oils obtained by stabilisation processes |
| 06100 | Crude petroleum extraction |
| 06100 | Crude petroleum production |
| 06100 | Crude petroleum production from bituminous shale and sand |
| 06100 | Mineral oil extraction |
| 06100 | Oil platform operation |
| 06100 | Oil production well or platform operating |
| 06100 | Oil shale mine |
| 06100 | Oil shale retorting |
| 06100 | Oil stabilisation plant operation |
| 06100 | |