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| 从事于: 14 phrases in 9 subjects |
| Aviation | 1 |
| China | 1 |
| Economy | 5 |
| General | 2 |
| Lighting other than cinema | 1 |
| Management | 1 |
| Metallurgy | 1 |
| Technology | 1 |
| Textile industry | 1 |
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