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脉 冲 谱 : 71 phrases in 13 subjects |
| Agriculture | 1 |
| Air defense | 7 |
| Aviation | 2 |
| Chemistry | 4 |
| Earth sciences | 6 |
| Electronics | 6 |
| General | 1 |
| Geophysics | 8 |
| Information technology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 8 |
| Space | 3 |
| Technology | 22 |
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