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| 系数变 换: 25 phrases in 11 subjects |
| Automobiles | 1 |
| Bridge construction | 2 |
| Business | 1 |
| Chemistry | 1 |
| Earth sciences | 2 |
| Electronics | 3 |
| Engineering geology | 3 |
| Finances | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 8 |
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