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人口 管 : 28 phrases in 14 subjects |
| Architecture | 2 |
| Chemistry | 4 |
| China | 1 |
| Electronics | 3 |
| General | 2 |
| Hydraulics | 1 |
| Metallurgy | 4 |
| Otorhinolaryngology | 2 |
| Polymers | 1 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 4 |
| United Nations | 1 |
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