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黄轴 : 25 phrases in 9 subjects |
| Architecture | 1 |
| Automobiles | 3 |
| Drilling | 1 |
| Electronics | 1 |
| Latin | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 5 |
| Space | 1 |
| Technology | 11 |
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