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| 导管架: 69 phrases in 10 subjects |
| Aviation | 1 |
| Bridge construction | 1 |
| Compressors | 1 |
| Drilling | 1 |
| Nautical | 1 |
| Navigation | 3 |
| Oil / petroleum | 54 |
| Shipbuilding | 1 |
| Technology | 5 |
| United Nations | 1 |
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