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反馈 线 : 42 phrases in 14 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Construction | 1 |
| Cryptography | 3 |
| Electric machinery | 1 |
| Electronics | 7 |
| General | 3 |
| Information technology | 4 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 7 |
| Technology | 10 |
| Telecommunications | 1 |
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