underground pipelines的意思|示意

Many underground pipelines are carried with heating tracer in permafrost region.

分析了带伴热管的寒区埋地管道的几何特性,建立了数学模型.

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The paper first analyzes the earthquake disasters of underground pipelines.

在本文中,首先分析了埋地管线的震害特征.

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Underground pipelines is an important life line in cities.

城市地下管线是城市的生命线工程.

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