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支管系统 : 31 phrases in 13 subjects |
| Aviation | 11 |
| Chemistry | 1 |
| Corporate governance | 1 |
| Earth sciences | 3 |
| Economy | 1 |
| Electronics | 5 |
| Horticulture | 1 |
| Information technology | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 2 |
| Space | 1 |
| Technology | 2 |
| Telecommunications | 1 |
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