The buried-pipe laying of steel natural gas line concerns entire urban gas supply system and the safety of people's lives and properties.
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 tube can be used for liquid or gas media conveyance and is especially suitable for oil and natural gas transportation and urban water supply and drainage system.
可 用来输送液体介质或气体介质，尤其适用于石油、天然气的输送和城镇的给排水系统中。
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