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硫烟 : 118 phrases in 14 subjects |
| Agriculture | 3 |
| Automobiles | 3 |
| Aviation | 1 |
| Chemistry | 2 |
| Construction | 1 |
| Ecology | 10 |
| General | 9 |
| Metallurgy | 9 |
| Oil / petroleum | 5 |
| Oil processing plants | 1 |
| Pharmacology | 40 |
| Space | 1 |
| Technology | 31 |
| Textile industry | 2 |
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