 |
| |||
| extraction of oil | |||
| oil extraction Recovery of oil by surface mining, as in tar sands or oil shales, or from tunnels in a shallow reservoir; oil extraction | |||
| extraction of petroleum | |||
| extracción de petróleo: 5 phrases in 2 subjects |
| Coal | 2 |
| Earth sciences | 3 |
|
| |||
| extraction of oil | |||
| oil extraction Recovery of oil by surface mining, as in tar sands or oil shales, or from tunnels in a shallow reservoir; oil extraction | |||
| extraction of petroleum | |||
| extracción de petróleo: 5 phrases in 2 subjects |
| Coal | 2 |
| Earth sciences | 3 |