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| 41. | Sanitary Sewage |
| 厕所污水 |
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| 42. | backing up of sewage |
| 污水倒灌 |
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| 43. | to dispose of sewage; to deal with effluents |
| 处理污水 |
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| 44. | collection of sewage |
| 收集污水 |
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| 45. | effluent strength |
| 污水浓度 |
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| 46. | sewage pumping station |
| 污水泵站 |
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| 47. | a sewage disposal system; a sewage treatment system |
| 污水处理系统 |
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| 48. | settlement of sewage |
| 污水沉淀 |
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| 49. | sewage chlorination |
| 污水氯化作用 |
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| 50. | contaminated water evaporator |
| 污水蒸发器 |
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