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| 持续久试验 | |||
| 扩大试验 | |||
| extended test: 13 phrases in 7 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Drilling | 2 |
| Electronics | 3 |
| Mining | 2 |
| Oil / petroleum | 3 |
| Technology | 1 |
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