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关闭系统 : 14 phrases in 10 subjects |
| Automobiles | 2 |
| Electronics | 1 |
| Information technology | 1 |
| Mining | 2 |
| Nautical | 2 |
| Navigation | 1 |
| Oil / petroleum | 1 |
| Project management | 1 |
| Securities | 1 |
| Technology | 2 |
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