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块间隙 : 21 phrases in 13 subjects |
| Chemistry | 1 |
| Computers | 1 |
| Electric machinery | 1 |
| Electronics | 5 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 4 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 2 |
| Telecommunications | 1 |
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