Home / Standards / GB/T 19799.1-2015 GB/T 19799.1-2015 Active Non-destructive testing—Ultrasonic testing—Specification for calibration block No. 1 无损检测 超声检测 1号校准试块 Standard Type GBT ICS 19.100; CCS J04 Status 现行 Issue Date 2015-10-09 Implementation 2016-06-01 Responsible Dept 国家标准委 Drafting Unit N/A