Home / Standards / GB/T 40324-2021 GB/T 40324-2021 Active Non-destructive testing—Testing method for large diameter round bars by focused ultrasound 无损检测 大直径圆棒聚焦超声检测方法 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 国家标准委 Drafting Unit N/A