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| аппарат обсадной трубы | |||
| оборудование обсадной колонны; установка обсадной колонны | |||
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套 管 设备 : 32 phrases in 4 subjects |
| Drilling | 7 |
| General | 22 |
| Oil processing plants | 1 |
| Technology | 2 |
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