叙述在长输液化气管道检修前清理原有的液化石油气所采用的水置换法。
It describes water replacement to clear long-distance LPG pipeline before repairing the pipeline.
液化气管道深埋在地下，存在检测和取样困难，对其运行状况难以掌握。
Liquefied petroleum gas(LPG)pipelines were embedded deeply underground. It was difficult to test, take sample and monitor operation conditions.
液化气管道深埋在地下，存在检测和取样困难，对其运行状况难以掌握。
Liquefied petroleum gas(LPG)pipelines were embedded deeply underground. It was difficult to test, take sample and monitor operation conditions.
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