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电 子探测 : 66 phrases in 13 subjects |
| Air defense | 2 |
| Automobiles | 1 |
| Aviation | 8 |
| Earth sciences | 4 |
| Ecology | 1 |
| Electronics | 19 |
| General | 4 |
| Geophysics | 4 |
| Metallurgy | 1 |
| Navigation | 1 |
| Oil / petroleum | 1 |
| Space | 9 |
| Technology | 11 |
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