Home / Standards / GB/T 40029-2021 GB/T 40029-2021 Active Steel strand for prestressed concrete of LNG 液化天然气储罐用预应力钢绞线 Standard Type GBT ICS 77.140.65 CCS H49 Status 现行 Issue Date 2021-04-30 Implementation 2021-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A