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| 尾随注入压裂支撑剂 | |||
| tail in: 14 phrases in 7 subjects |
| Drilling | 2 |
| Economy | 1 |
| General | 3 |
| Law | 4 |
| Oil / petroleum | 2 |
| Technology | 1 |
| Wushu | 1 |
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