 |
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| forage à grande profondeur | |||
| forage de grande profondeur; forage profond | |||
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| forer a grande profondeur | |||
| forage à grande profondeur | |||
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deep drilling : 8 phrases in 6 subjects |
| Energy industry | 1 |
| Geology | 1 |
| Metallurgy | 3 |
| Natural sciences | 1 |
| Technology | 1 |
| United Nations | 1 |