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| 作特性曲线: 15 phrases in 9 subjects |
| Air defense | 2 |
| Chemistry | 1 |
| Electronics | 4 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |
| Telecommunications | 1 |
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