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| 地下査勘; 地下勘探 | |||
| 地下探査〔勘测〕 | |||
| 地下探查; 地下探测; 地下勘察; 地下勘测; 地下查勘 | |||
| subsurface exploration: 5 phrases in 3 subjects |
| Engineering geology | 1 |
| Geology | 1 |
| Technology | 3 |
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