在暖通空调领域，涉及大量的流体输配管网分析问题。
In the domain of HV&AC, there are many problems about pipe network for fluid supply.
燃气输配管网的压力级制、管网型式、阀门配置和管径配置等是管网结构因素。
The pressure range of gas transmission and distribution network, network type, valve arrangement, pipe diameter arrangement, etc.
本文分析了我国石油输配管网系统的概况及其供应链组成，阐述了物流运输规划理论在石油管输网络优化中的应用，并建立了石油输配管网优化模型。
This paper makes analyses on the contents of the road transportation planning, puts forward the methods for making the demands estimation, and determines the principles of planning and practicing.
天然气输配管网具有自然垄断的基因，有着规模经济性以及范围经济性。但若任其滥用垄断地位允许其自由缔结合同则有限制竞争和损害消费者权利之虞。
With the essence of natural monopoly and freedom of contract, if such a dominant undertaking abuses its market power, there is a risk of eliminate the competition and harming the consumer interest.
为了充分利用现有的管道及设备，本文还对西北缘输配气管网系统的输气能力进行了研究。
The capacity of the gas transportation pipeline network system was also studied so as to utilize all the existing pipeline and equipment fully in this dissertation.
方法的共同特点是先找出管网输配最大流量的工况，然后确定管径及水压。
The common characteristic features of this method is to deal with the working conditions of the designed maximum discharge of closed circuit and then to determine the pipe diameters and water head.
方法的共同特点是先找出管网输配最大流量的工况，然后确定管径及水压。
The common characteristic features of this method is to deal with the working conditions of the designed maximum discharge of closed circuit and then to determine the pipe diameters and water head.
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