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六亚甲胺 : 39 phrases in 12 subjects |
| Agriculture | 3 |
| Chemistry | 9 |
| Dermatology | 1 |
| Electronics | 4 |
| General | 7 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Pharmacology | 1 |
| Plastics | 5 |
| Polymers | 4 |
| Technology | 1 |
| Water resources | 1 |
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