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油残渣 : 53 phrases in 11 subjects |
| Animal husbandry | 4 |
| Architecture | 1 |
| Automobiles | 1 |
| Chemistry | 1 |
| Drilling | 1 |
| Ecology | 2 |
| Metallurgy | 2 |
| Oil / petroleum | 18 |
| Oil processing plants | 3 |
| Shipbuilding | 2 |
| Technology | 18 |
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