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| 数字 运算: 25 phrases in 9 subjects |
| Aviation | 2 |
| Computer numerical control | 1 |
| Cryptography | 1 |
| Electronics | 5 |
| Information technology | 2 |
| Oil / petroleum | 2 |
| Space | 4 |
| Technology | 6 |
| Telecommunications | 2 |
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