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| chemical processing of coal | |||
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| coal chemical industry (业) | |||
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煤化工 : 22 phrases in 7 subjects |
| Aviation | 1 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 3 |
| General | 1 |
| Metallurgy | 6 |
| Oil processing plants | 1 |
| Technology | 9 |
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