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| exploratory hole; exploratory borehole | |||
| 试钻钻孔: 54 phrases in 11 subjects |
| Architecture | 1 |
| Bridge construction | 1 |
| Coal | 1 |
| Construction | 2 |
| Electronics | 2 |
| Engineering geology | 7 |
| Explosives and Explosive Ordnance Disposal | 4 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Mining | 1 |
| Technology | 32 |
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