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射 流流线 : 25 phrases in 13 subjects |
| Agriculture | 1 |
| Astronomy | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| Electronics | 6 |
| General | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Technology | 6 |
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