This paper introduced the type of underground piping in Beijing Yanshan Petrochemical Co. , Ltd. , and analyzed the present situation of the underground pipingnetwork.
介绍了中国石化北京燕化石油化工股份有限公司地下管线的种类，分析了地下管网现状。
2
There is a great significance of theory and valuable application of engineering about the research of unsteady flow character in the system of hydrodynamic pipingnetwork.
水力管网系统中非定常流动特性的研究具有重要的理论意义与工程应用价值。
3
According to the various characteristics of underground pipingnetwork of supplying water, a basic thinking of anti - seism of underground pipingnetwork can be established.