Home / Standards / GB/T 23912-2009 GB/T 23912-2009 Active Non-destructive testing - Practice for immersed ultrasonic testing by the reflection method using pulsed longitudinal waves 无损检测 液浸式超声纵波脉冲反射检测方法 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2009-05-26 Implementation 2009-12-01 Responsible Dept 国家标准委 Drafting Unit N/A