In the sewer main pipe and canal design, problems like control of laying depth, avoidance of layout in area of sea reclamation or riverside along and cut down the distance of pressurized line were taken into consideration.
主干管渠设计中注意了控制埋深，避开填海区，缩短压力管，污水截流管离开沿河岸区，管道与河道相交的做法以及运用顶管施工技术等。
Here, the main advantage is that the foul sewer is flushed from time to time by part of the rainwater. However the serious disadvantage is that overflow s are necessary on the foul sewer, causing possible pollution to watercourses.
半分流式的主要优点是污水管可以不断地被部分雨水冲洗，但它最大的缺点是污水管上必须设置排溢口，这可能引起水体的污染。
Here, the main advantage is that the foul sewer is flushed from time to time by part of the rainwater. However the serious disadvantage is that overflows are necessary on the foul sewer, causing possible pollution to watercourses.
半分流式的主要优点是污水管可以不断地被部分雨水冲洗，但它最大的缺点是污水管上必须设置排溢口，这可能引起水体的污染。
The main methods for inhibition of the hydrogen sulfide emission in sewer are as follows: reducing the turbulence, increasing the alkalinity, reaeration, ventilation.
而抑制下水道中硫化氢气体释放的主要手段包括：降低水的紊流程度，增加入流污水的碱度，向下水道内充氧，改善通风环境。
Hydrogen sulfide corrosion is one of main reasons which caused sewer deterioration.
硫化氢腐蚀是造成排水管道损坏的主要原因之一。
Close offthe main sewer linefrom the prison.
把监狱的主下水道关了。
Monitoring method for combustible and poisonous gas from urban sewer, including gas leakage source, main composition, and concentration was introduced. It provided scientific and effective basis for precluding gas explosion and protecting personnel from poisoning.
介绍了调查城市下水道内可燃有毒气体的泄漏来源、主要成分及浓度的方法，为紧急排除下水道危险气体泄漏引发的爆炸、人员中毒等事故提供了科学有效的依据。
Difficult problem in sewer main construction, the joint of sewer main pipe to underground double deck culvert has been solved by a new method: blast operation.
通过工程实例介绍了在排水工程施工中解决排水干管与双层暗涵连接这一难题的一种新办法&爆破法。
The plans show the drains and plumbing fixtures, but the plumber figures out how to route the pipes and hook up to the water main and sewer.
计划指出排水沟和排水管固定装置，而管道工则构想如何布置管道和连接到总水管和下水道。
The overflow sewer treatment facility is the main method in controlling the combined sewer overflows (CSOs), and flow-field distribution in the sedimentation tank is the key factor of successful operations.
合流制溢流污水处理装置是控制溢流污染的主要措施，而沉淀池的流态是决定其运行效果的关键因素。
Results: The prevalence rate of sanitary toilet in Sichuan province is 33.46%; the innoxious disposal rate of human and livestock's feces is 10.34%; the main types of sanitary toilet are marsh gas pool, three-grid feces pool and complete sewer pool.
结果：全省卫生厕所普及率为3346%，人畜粪便无害化处理率为1034%，卫生厕所主要有沼气池、三格化粪池、完整下水道式3种类型。
Several of these flow into a branch sewer, which joins first a sub-main and then a main sewer taking it to the treatment plant.
这些街道污水管又相结一条污水支管。此支管与次干管连接，然后经主干管将污水送至污水处理厂。
On analysis of sunk well and overturning in pipe jacking in main sewer of coastal areas
滨海地区污水干管顶管沉井倾覆事故分析
Michel: Somewhere on the other side of this wall is the main drainage pipe to the prison's old sewer system.
这面墙背面的某个地方就是通向监狱原有下水系统的主排水管道。
Results: The prevalence rate of sanitary toilet in Sichuan province is 33.46 %; the innoxious disposal rate of human and livestock's feces is 10.34 %; the main types of sanitary toilet are marsh gas pool, three-grid feces pool and complete sewer pool.
结果：全省卫生厕所普及率为3346%，人畜粪便无害化处理率为1034%，卫生厕所主要有沼气池、三格化粪池、完整下水道式3种类型。