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| 21. | unrefined or only partly refined sugar. |
| 未提炼或只有部分提炼的糖。 |
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| 22. | refinery liquor |
| 提炼液 |
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| 23. | extractive matter |
| 提炼物 |
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| 24. | lack of refinement |
| 粗俗 |
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| 25. | aromatic hydrocarbon extraction |
| 芳香烃提炼 |
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| 26. | rendering works |
| 提炼工程 |
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| 27. | refinery output |
| 提炼产品产量 |
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| 28. | step refinement program |
| 逐步求精程序 |
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| 29. | petroleum distillation. |
| 石油提炼 |
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| 30. | nuclear fuel refinement |
| 核燃料精制 |
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