| 1. | It became necessary to provide drainage or sewer systems to carry such wastes away from the area .
提供排水系统或污水管道系统，把废物排出市区已成为必要。 |
| 2. | This is especially true where the effluent is being discharged to a municipal sewer to avoid shock loadings to the treatment plant .
特别重要的是，在废水排入城市污水管道时不要对城市污水处理厂造成冲击负荷。 |
| 3. | Air admittance valves for plumbing drainage systems
污水管道系统用气体导入阀 |
| 4. | Construction and testing of drains and sewers
排水管和污水管道的施工和检验 |
| 5. | Control of corrosion by sulphuretted hydrogen of sewage pipe
污水管道的硫化氢腐蚀及其控制 |
| 6. | The sewage pipes were choked with rubbish
垃圾阻塞了污水管道。 |
| 7. | Standard specification for asbestos - cement nonpressure sewer pipe
石棉水泥无压污水管道的标准规范 |
| 8. | 1 , mosaic xf - x be installed in the pipe of rain and sewage in cities
1镶嵌式xf - x安装于城市雨水污水管道中间 |
| 9. | We shall have to dig under the river to lay the sewage pipe
"为了铺设污水管道,我们必须在河床下面开一条通道。 |
| 10. | 5 , build - in xf - f be installed at the exit end of rain and sewage system in cities
5内置式xf - f安装于城市雨水污水管道中间 |
