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| subsurface exploration; subsurface investigation | |||
| underground exploration | |||
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地下探测 : 12 phrases in 7 subjects |
| Earth sciences | 1 |
| Engineering geology | 1 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 6 |
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