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抛物 反射 面 : 57 phrases in 11 subjects |
| Air defense | 6 |
| Automobiles | 2 |
| Aviation | 2 |
| Communications | 1 |
| Electronics | 4 |
| General | 2 |
| Oil / petroleum | 1 |
| Space | 10 |
| Technology | 27 |
| Telecommunications | 1 |
| Wind Energy | 1 |
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