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化合价 : 34 phrases in 10 subjects |
| Business | 1 |
| Chemistry | 13 |
| Electronics | 3 |
| General | 3 |
| Geochemistry | 2 |
| Medical | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Oil processing plants | 2 |
| Technology | 6 |
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