in order to improve gas drainage volume, gas drainage on fully mechanized caving face and gas drainage pipeline network system are analyzed.
为了提高矿井瓦斯抽放量,重点分析了综放工作面的瓦斯抽放和瓦斯抽放管网系统方面。
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。
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。