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| 试用制: 19 phrases in 10 subjects |
| Air defense | 1 |
| Aviation | 3 |
| Business | 5 |
| Electronics | 3 |
| General | 1 |
| Mechanics | 2 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 1 |
| Textile industry | 1 |
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