Home / Standards / GB/T 19799.2-2024 GB/T 19799.2-2024 Active Non-destructive testing—Ultrasonic testing block—Part 2: Calibration block No.2 无损检测 超声检测试块 第2部分:2号标准试块 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2024-11-28 Implementation 2024-11-28 Responsible Dept 国家标准委 Drafting Unit N/A