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| четвёртая кольцевая автодорога Пекина | |||
| 四环: 110 phrases in 13 subjects |
| Agrochemistry | 1 |
| Antennas and waveguides | 1 |
| Biotechnology | 1 |
| Electronics | 2 |
| Environment | 1 |
| General | 42 |
| Mathematics | 1 |
| Medical | 31 |
| Mineralogy | 2 |
| Music | 1 |
| Oil / petroleum | 1 |
| Oil processing plants | 3 |
| Technology | 23 |
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