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气动 力学的 : 21 phrases in 11 subjects |
| Automobiles | 3 |
| Aviation | 4 |
| Business | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 4 |
| Oil / petroleum | 1 |
| Space | 1 |
| Sports | 1 |
| Technology | 3 |
| Wind Energy | 1 |
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