Home / Standards / GB/T 31211-2014 GB/T 31211-2014 Abolished Non-destructive testing―Ultrasonic guided wave testing―General principle 无损检测 超声导波检测 总则 Standard Type GBT ICS 19.100 CCS J04 Status 废止 Issue Date 2014-09-03 Implementation 2015-05-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委