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| 封隔器: 153 phrases in 9 subjects |
| Drilling | 96 |
| General | 15 |
| Oil / petroleum | 15 |
| Oil and gas | 1 |
| Oil and gas technology | 5 |
| Oil processing plants | 15 |
| Oilfields | 3 |
| Sakhalin | 1 |
| Technology | 2 |
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