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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.
youdao
-
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.
youdao