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| 限制角 | |||
| 极限角 | |||
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limiting angle : 11 phrases in 7 subjects |
| Air defense | 1 |
| Engineering geology | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |
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