Demand is strong for steel piping in the North American oil and gas industry, but regulators will study the deal to see if there are any implications for energy security.
北美石油和天然气行业对钢管的需求比较强劲，但监管机构将调查研究，以决定此项收购是否对能源安全产生影响。
Setting up relation of corrosive quantity and time of corrosived pressure pipelines, setting up model of GM (1, 1), and then carry through precise check up, finally study pressure piping reliability.
建立了压力管道受到腐蚀时的腐蚀量与时间的关系，建立GM(1,1)模型，然后对模型进行精度检验，最后对压力管道的可靠度进行研究。
Therefore, it is very necessary and practical to study the mechanism of dike foundation piping and the effect of suspended cut-off wall.
因此研究管涌机理，并在此基础上研究悬挂式防渗墙对双层堤基管涌的控制效果，具有重要的现实意义。
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