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| 开合试验 | |||
| switching test: 21 phrases in 8 subjects |
| Aviation | 5 |
| Electronics | 5 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 4 |
| Space | 1 |
| Technology | 3 |
| Telecommunications | 1 |
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