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| exploratory pit; pioneer well; prospecting well; trail shaft | |||
| exploration well; exploratory well | |||
| investigation shaft | |||
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勘探井 : 50 phrases in 12 subjects |
| Company name | 6 |
| Drilling | 4 |
| Earth sciences | 2 |
| Ecology | 1 |
| Economy | 1 |
| Engineering geology | 4 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Geology | 3 |
| Geophysics | 1 |
| Oil / petroleum | 3 |
| Rail transport | 1 |
| Technology | 22 |
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