Home / Standards / GB/T 21492-2019 GB/T 21492-2019 Active Glass fiber reinforced plastics jacking pipes 玻璃纤维增强塑料顶管 Standard Type GBT ICS 83.120 CCS Q23 Status 现行 Issue Date 2019-08-30 Implementation 2020-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A