Home / Standards / GB/T 19799.3-2025 GB/T 19799.3-2025 Active Non-destructive testing—Ultrasonic testing block—Part 3:Calibration block for curved surface 无损检测 超声检测试块 第3部分:曲面检测标准试块 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2025-01-24 Implementation 2025-01-24 Responsible Dept 国家标准委 Drafting Unit N/A