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电 子自转 : 24 phrases in 11 subjects |
| Agriculture | 2 |
| Aviation | 3 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 2 |
| Polymers | 7 |
| Project management | 1 |
| Rail transport | 1 |
| Shipbuilding | 3 |
| Space | 2 |
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