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| непродуктивная скважина | |||
| непродуктивная скважина duster | |||
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空 井 : 33 phrases in 9 subjects |
| Drilling | 7 |
| General | 11 |
| Geology | 1 |
| Microelectronics | 1 |
| Mining | 3 |
| Oil / petroleum | 3 |
| Oilfields | 2 |
| Refrigeration | 1 |
| Technology | 4 |
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