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UDC中华人民共和国行业标准lJ;JLfJCJJ/T250-2016P备案号J2205-2016城镇燃气管道穿跨越工程技术规程Technicalspecificationforcrossingandae...
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上海市工程建设规范[g)~DG厅J08-2412一2023J16907-2023城镇供水和燃气管网泄漏声学检测与评估技术标准Technicalstandardforacousticleakdet...
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ICS91.140p45自」中华人民共和国城镇建设行业标准CJ/T479-2015代替CJ/T3075.1-1998,CJ/T3075.2-1998燃气燃烧器具实验室技术通则Generaltech...
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ICS01.040.91p47上0031海市士也方标准DB31月1176-2019城镇燃气管道水平定向钻进工程技术规程Technicalspecificationforhorizontaldirection...
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