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凹顶 : 86 phrases in 14 subjects |
| Agriculture | 2 |
| Architecture | 1 |
| Automobiles | 14 |
| Aviation | 1 |
| Compressors | 1 |
| Construction | 2 |
| Dermatology | 1 |
| General | 7 |
| Ichthyology | 3 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Technology | 46 |
| Textile industry | 3 |
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