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| phase transition | |||
| 阶段 过渡: 20 phrases in 11 subjects |
| Aviation | 1 |
| Economy | 2 |
| Heavy equipment vehicles | 1 |
| Metallurgy | 2 |
| Nautical | 3 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 6 |
| Transport | 1 |
| United Nations | 1 |
| Water resources | 1 |
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