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间隔时间计 : 32 phrases in 12 subjects |
| Automobiles | 1 |
| Aviation | 7 |
| Computers | 1 |
| Electronics | 5 |
| General | 3 |
| Information technology | 1 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Securities | 1 |
| Space | 1 |
| Technology | 8 |
| Textile industry | 2 |
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