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| 联合蒸馏塔 | |||
| 型钢;混凝土混成柱; 组合柱 | |||
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| 混合套管柱 | |||
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| 复合套管柱 | |||
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комбинированная колонна : 4 phrases in 3 subjects |
| Drilling | 1 |
| General | 1 |
| Oil processing plants | 2 |
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