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自调相 : 20 phrases in 10 subjects |
| Air defense | 2 |
| Automobiles | 2 |
| Aviation | 2 |
| Electronics | 6 |
| General | 1 |
| Oil / petroleum | 1 |
| Radio | 2 |
| Shipbuilding | 1 |
| Technology | 2 |
| Water resources | 1 |
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