Home / Standards / GB/T 18852-2020 GB/T 18852-2020 Active Non-destructive testing—Ultrasonic testing—Reference blocks and test procedures for the characterization of contact probe sound beams 无损检测 超声检测 测量接触探头声束特性的参考试块和方法 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 国家标准委 Drafting Unit N/A