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半地下 : 40 phrases in 13 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Astronautics | 1 |
| Ecology | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| General | 4 |
| Hydroelectric power stations | 3 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Rail transport | 1 |
| Space | 4 |
| Technology | 15 |
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