Home / Standards / GB/T 23858-2009 GB/T 23858-2009 Active Manhole cover 检查井盖 Standard Type GBT ICS 91.140.80 CCS P42 Status 现行 Issue Date 2009-05-27 Implementation 2010-02-01 Responsible Dept 住房城乡建设部 Drafting Unit 住房城乡建设部