city s drainage pipeline system 城市排水管道系统
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。
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