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净 孔 : 21 phrases in 10 subjects |
| Agriculture | 1 |
| Architecture | 1 |
| Bridge construction | 1 |
| Cosmetics and cosmetology | 1 |
| Engineering geology | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 3 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 10 |
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