The city drainage pipeline network needs comprehensive monitoring to keep its operation safety.
保障城市排水管网安全运行，必需对排水管网进行全面监测。
We have designed and have developed the JGY-1 type laser pipeline aligning instrument for rising the accuracy and the productivity of the construction of city drainage pipeline network.
为了提高城市排水管道网络敷设的精确度和生产率，我们设计和研制了JGY-1型激光管道准直仪。
This paper gives us a helpful solution by examples of the problems during quality control of inspection in city underground drainage pipeline.
本文通过工程实例，探讨了在进行城市地下排水管线探查的质量控制中需要注意的问题，以供参考。
The city rain flux is the design foundation of city rain drainage pipeline, the standard according to outdoors drainage criterion (GBJ14-87).
城市雨水流量是城市雨水排除管道设计的基础和依据，其标准按《室外排水设计规范》（GBJ14-87）执行；
As the rapid process of city infrastructure construction and urbanization, how to protect the safe operation of urban drainage pipeline network is an urgent problem.
随着我国城市化进程和城市基础设施建设的加快，如何保障城市排水管网的运行安全是急需解决的问题。
As the rapid process of city infrastructure construction and urbanization, how to protect the safe operation of urban drainage pipeline network is an urgent problem.
随着我国城市化进程和城市基础设施建设的加快，如何保障城市排水管网的运行安全是急需解决的问题。
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