黑河是西部管道工程采用大开挖方式穿越的距离最长的河流， 原油与成品油管道采用同沟敷设方式穿越该河流。
West Pipeline crossing Heihe River is the longest crossing project by a large excavation way and the method of laying both crude oil pipeline and products pipeline in a single trench.
钢质天然气管道埋地敷设工程关系到整个城市供气系统和人民生命财产的安全。
The buried-pipe laying of steel natural gas line concerns entire urban gas supply system and the safety of people's lives and properties.
结合工程设计经验和实地调研，探讨了住宅小区供暖供热中的系统形式、管道安装、保温、外网敷设、热电联产与集中锅炉房供热经济比较等问题。
Based on design experience and results of investigation, discusses some questions about heating modes for residential quarters, piping installation and insulation and pipe network lay out.
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