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| 煤田地质勘探寻找和查明煤炭资源的地质工作。即找煤、普查、详查、精查等地质勘探工作 | |||
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coal prospecting : 17 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 10 |
| Technology | 7 |
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