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| 切换 开 关: 39 phrases in 14 subjects |
| Architecture | 3 |
| Automobiles | 2 |
| Aviation | 1 |
| Electric machinery | 2 |
| Electric traction | 1 |
| Electronics | 9 |
| Exhibitions | 1 |
| Metallurgy | 2 |
| Nuclear and fusion power | 3 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 11 |
| Wind Energy | 1 |
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