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联氧 : 41 phrases in 13 subjects |
| Agriculture | 2 |
| Animal husbandry | 1 |
| Chemistry | 10 |
| Electronics | 1 |
| General | 6 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Perfume | 1 |
| Pharmacology | 3 |
| Plastics | 3 |
| Polymers | 6 |
| Technology | 3 |
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