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谐波调谐 : 68 phrases in 12 subjects |
| Air defense | 8 |
| Automobiles | 2 |
| Aviation | 1 |
| Drilling | 1 |
| Electronics | 24 |
| General | 1 |
| Geophysics | 1 |
| Information technology | 4 |
| Oil / petroleum | 1 |
| Shipbuilding | 5 |
| Technology | 15 |
| Telecommunications | 5 |
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