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Terms for subject Oil and gas containing колонна УБТ | all forms | exact matches only | in specified order only
| Russian | English |
| колонна УБТ | overshot drill-collar string (MichaelBurov) |
| колонна УБТ с диаметром, близким к диаметру долота | overshot drill-collar string (MichaelBurov) |