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| 试验孔 | |||
| 钻屑试样 | |||
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| 试钻 | |||
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| 试样钻屑 | |||
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test drilling : 13 phrases in 5 subjects |
| Drilling | 2 |
| Engineering geology | 2 |
| Geophysics | 1 |
| Oil / petroleum | 3 |
| Technology | 5 |
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