Home / Standards / GB/T 41401-2022 GB/T 41401-2022 Active Intelligent manhole cover 智能井盖 Standard Type GBT ICS 35.240.50 CCS L73 Status 现行 Issue Date 2022-04-15 Implementation 2022-11-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A