| 1. | The sludge is passed under a vacuum pump and allows the water to pass through a discharge or recirculation drain .
用真空泵除去污泥的固体含量而该泥水则经排水渠或回流渠排出。 |
| 2. | Construction of box culvert no . 1 extension in progress
箱形排水渠的伸延工程 |
| 3. | Investigation of buried road drains affecting slopes
勘测埋藏在道路中影响斜坡的排水渠 |
| 4. | Construction of temporary drainage pipe at zone a
于a区建造临时排水渠 |
| 5. | Land resumption for drainage improvement works on lamma island
南丫岛收地进行排水渠改善工程 |
| 6. | Rebar fixing of extension of box culvert no . 1
箱形排水渠的钢筋 |
| 7. | Laying temporary drainage pipe at zone a
于a区铺设临时排水渠 |
| 8. | Laying of temporary drainage at zone e
于e区铺设临时排水渠 |
| 9. | Methods of investigation of buried road drains affecting slopes
会影响斜坡的地下道路排水渠的勘测方法 |
| 10. | Connecting drains and sewers clause
接驳排水渠及污水渠条款 |
