Home / Standards / GB/T 38980-2020 GB/T 38980-2020 Active Test method for artificial defect sizes of zirconium tube flaw detection comparison samples 锆管探伤对比试样人工缺陷尺寸测量方法 Standard Type GBT ICS 77.040.99 CCS H21 Status 现行 Issue Date 2020-07-21 Implementation 2021-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A