Home / Standards / GB/T 41048-2021 GB/T 41048-2021 Active Technical requirements for plastics inspection chamber and manhole for urban drainage 城镇排水用塑料检查井技术要求 Standard Type GBT ICS 91.140.80 CCS P41 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A