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本文简要介绍了美国南加利福尼亚天然气公司用聚乙烯管道插入原有管道的方法来更换地震损伤的钢管，并详细介绍了此项技术的现场施工情况。
This paper briefly introduces the method by which Southern California Gas Company uses polyethylene pipes to insert the existing pipelines to replace steel pipes damaged by earthquakes and details the on-site construction of this technology.