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| 21. | The sewer was gorged with rubbish |
| 下水道塞满了垃圾。 |
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| 22. | The drains are choked with dead leaves. |
| 下水道被枯叶堵住. |
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| 23. | Mud choked the drainpipe. |
| 淤泥堵塞了下水道. |
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| 24. | 3 The Permit Holder shall install proper site drainage system and petrol interceptor on the project site |
| 在临时巴士车厂营运之前，许可证持有人须在工程地点装妥下水道系统和燃油隔滤装置。 |
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| 25. | sewerage (system) |
| 下水道系统; 污水排水工程 |
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| 26. | sewerage system of radial patterns |
| 辐射式下水道系统 |
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| 27. | Sewerage Planning Division |
| 下水道计画课 |
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| 28. | The drains were bunged up. |
| 下水道给堵住了。 |
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| 29. | sanitary sewers |
| 生活污水管道; 下水道 |
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| 30. | drainage management |
| 排水管理 |
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