ICS91.140.40CCSP47DB11北京市地方标准DB11/T1136—2023DB11/T1136—2014城镇燃气管道翻转内衬修复工程施工及验收规程Specificationforconstructionandacceptanceofcured-in-placepiperehabilitationengineeringforcitygaspipeline2023-03-30发布2023-07-01实施北京市市场监督管理局发布DB11/T1136—2023I目次前言.................................................................................II1范围.....................
