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| 31. | air pollution control activity |
| 大气污染控制活动 |
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| 32. | public pollution control work |
| 公害防治工作 |
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| 33. | oil pollution control vessel |
| 油污染控制船 |
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| 34. | Department of Pollution Control |
| 污染控制司 |
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| 35. | Water Pollution Control Authority |
| 水污染管制监督 |
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| 36. | environmental pollution control measures |
| 环境污染控制措施 |
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| 37. | industrial pollution control engineering |
| 工业污染控制工程 |
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| 38. | air pollution control engineering |
| 空气污染控制工程 |
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| 39. | waste gas pollution control |
| 废气治理 |
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| 40. | oil pollution control launch |
| 专用油污控制船 |
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