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三角 角度 : 35 phrases in 11 subjects |
| Armored vehicles | 1 |
| Automobiles | 2 |
| Aviation | 2 |
| Electric machinery | 1 |
| Mathematics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Space | 3 |
| Technology | 15 |
| Textile industry | 5 |
| Wind Energy | 2 |
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