Home / Standards / GB/T 23904-2009 GB/T 23904-2009 Abolished Non-destructive testing - Test method for ultrasonic testing by surface wave 无损检测 超声表面波检测方法 Standard Type GBT ICS 19.100 CCS J04 Status 废止 Issue Date 2009-05-26 Implementation 2009-12-01 Responsible Dept 国家标准委 Drafting Unit N/A