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| formation analysis | |||
| stratigraphic analysis | |||
| stratigraphical analysis | |||
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| stratigraphic analysis | |||
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地层 分析 : 21 phrases in 8 subjects |
| Drilling | 1 |
| Earth sciences | 3 |
| Geology | 2 |
| Geophysics | 2 |
| Metallurgy | 1 |
| Mining | 2 |
| Oil / petroleum | 5 |
| Technology | 5 |
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