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正规数 : 31 phrases in 10 subjects |
| Business | 3 |
| Commerce | 1 |
| Construction | 1 |
| Earth sciences | 2 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Statistics | 1 |
| Technology | 19 |
| Telecommunications | 1 |
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