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| irrigating of drill hole | |||
| irrigating of borehole | |||
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钻孔 冲 洗 : 15 phrases in 6 subjects |
| Coal | 1 |
| Construction | 1 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 5 |
| Hydroelectric power stations | 1 |
| Technology | 5 |
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