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| collar bearings (MichaelBurov) | |||
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координаты скважины : 15 phrases in 7 subjects |
| Drilling | 1 |
| Gold mining | 5 |
| Makarov | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 2 |
| Oilfields | 1 |
| Technology | 1 |
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