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地层层位 : 112 phrases in 16 subjects |
| Advertising | 1 |
| Architecture | 1 |
| Bridge construction | 1 |
| Business | 1 |
| Desert science | 1 |
| Drilling | 2 |
| Earth sciences | 3 |
| Economy | 1 |
| Engineering geology | 7 |
| Furniture | 1 |
| General | 3 |
| Geology | 1 |
| Hydroelectric power stations | 1 |
| Mining | 4 |
| Oil / petroleum | 37 |
| Technology | 47 |
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