穿插施工的分段作业使得聚乙烯内衬不可避免地要从管内跨越若干管道缝隙。
The partition insertion in the process makes the polyethylene lining span inevitably, inside the pipeline, some gaps at host pipe joints.
穿插施工的分段作业使得聚乙烯内衬不可避免地要从管内跨越若干管道缝隙。
The partition insertion in the process makes the polyethylene lining span inevitably, inside the pipeline, some gaps at host pipe joints.
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