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分圆法 : 22 phrases in 9 subjects |
| Bridge construction | 1 |
| Cryptography | 3 |
| Earth sciences | 1 |
| Electronics | 1 |
| Engineering geology | 3 |
| General | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 10 |
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