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对燃气管道及设备投运或检修前置换的方法及过程进行了分析。在直接置换法和间接置换法的基础上 ,提出了中间过渡置换法 ,主要用于燃气的城市管网及长输管线。
The gas pipeline and equipment put into operation or maintenance before the replacement method and process were analyzed. Based on the direct replacement method and the indirect replacement method, an intermediate transitional replacement method is proposed, which is mainly used for urban gas pipelines and long-distance pipelines.