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全气量 : 19 phrases in 9 subjects |
| Automobiles | 2 |
| Aviation | 2 |
| Earth sciences | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Pharmacology | 1 |
| Rail transport | 1 |
| Space | 6 |
| Technology | 3 |
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