 |
| |||
| oil sand | |||
| |||
| oil sand | |||
| deep sand (in mehr als 2500 ft. Teufe); oil-impregnated sand; petroleum tar sand | |||
| tar sand (crude oil extraction); oil sand (crude oil extraction); bituminous sand (crude oil extraction) | |||
| bituminous sand; tar sand | |||
|
Olsand : 2 短语, 2 学科 |
| 地球科学 | 1 |
| 矿业 | 1 |