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压降比 : 17 phrases in 9 subjects |
| Automobiles | 1 |
| Aviation | 3 |
| Electric machinery | 2 |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Hydrology | 1 |
| Space | 1 |
| Technology | 5 |
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