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压密的 : 27 phrases in 10 subjects |
| Automobiles | 4 |
| Drilling | 3 |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 6 |
| Geophysics | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 6 |
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