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书犐犆犛91.140.80犆犆犛犘41
中华人民共和国国家标准犌犅/犜41048—2021城镇排水用塑料检查井技术要求犜犲犮犺狀犻犮犪犾狉犲
狇狌犻狉犲犿犲狀狋狊犳狅狉
狆犾犪狊狋犻犮狊犻狀狊
狆犲犮狋犻狅狀犮犺犪犿犫犲狉犪狀犱
犿犪狀犺狅犾犲犳狅狉狌狉犫犪狀犱狉犪犻狀犪
犵犲2021?12?31发布2022?07?01实施国家市场监督管理总局
国家标准化管理委员会发布
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GBT 41048-2021 城镇排水用塑料检查井技术要求.pdf