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管缝 : 145 phrases in 15 subjects |
| Chemistry | 1 |
| Construction | 3 |
| Drilling | 5 |
| Electronics | 10 |
| General | 56 |
| Medical | 9 |
| Metallurgy | 2 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 8 |
| Oil and gas technology | 1 |
| Oil processing plants | 1 |
| Pipelines | 1 |
| Radio | 1 |
| Technology | 44 |
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