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31. | corrective method |
| 改进方法 |
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32. | improvement patent |
| 改进专利 |
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33. | improvement planting |
| 改进栽植 |
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34. | quality improvement |
| 质量改进 |
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35. | fuel modification |
| 燃料改进 |
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36. | operations improvement |
| 操作改进 |
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37. | Improve on packing |
| 改进包装 |
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38. | modified simplex |
| 改进单纯形 |
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39. | PI (Product Improve) |
| 产品改进 |
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40. | Other Suggestion |
| 改进意见 |
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