Home / Standards / GB/T 39211-2020 GB/T 39211-2020 Active Testing method of phased array technology for ship steel weld 船舶钢焊缝超声相控阵检测方法 Standard Type GBT ICS 47.020.01 CCS U06 Status 现行 Issue Date 2020-10-11 Implementation 2021-05-01 Responsible Dept 国家标准委 Drafting Unit N/A