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| revolving blowout preventer; rotating blowout preventer; rotating head; tight head | |||
| rotating head stripper | |||
| вращающийся противовыбросовый превентор: 11 phrases in 5 subjects |
| Oil / petroleum | 4 |
| Oil and gas | 3 |
| Oil and gas technology | 2 |
| Oilfields | 1 |
| Technology | 1 |