Home / Standards / GB/T 27669-2011 GB/T 27669-2011 Abolished Non-destructive testing - Ultrasonic inspection - Evaluating electronic characteristics of ultrasonic test instruments 无损检测 超声检测 超声检测仪电性能评定 Standard Type GBT ICS 19.100 CCS N77 Status 废止 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会