The listen and close methods open and close an input pipe, respectively.
listen和close方法分别打开和关闭输入管道。
Methods open and close an input pipe, respectively.
方法分别打开和关闭输入管道。
This paper expounds the direct embed construction of heat input pipe with big diameter, and its constructing method and quality control in the rebuilding of urban pipe network as well.
论述了大管径供热管道直埋施工，在城市管网改造中的施工方法和质量控制。
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