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编 码 单 : 33 phrases in 12 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Business | 2 |
| Communications | 1 |
| Electronics | 17 |
| Information technology | 1 |
| Multimedia | 1 |
| Rail transport | 1 |
| Space | 2 |
| Technology | 4 |
| Telecommunications | 1 |
| Typography | 1 |
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