China 'GB/T 28880-2012
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 28880-2012
Non-destructive testing - Evaluating performance characteristics of ultrasonic pulse-echo testing systems without the use of electronic measurement instruments 无损检测 不用电子测量仪器对脉冲反射式超声检测系统性能特性的评定
Issued Date:2012-11-05
Implemented Date:2013-02-15
Issued by:
The Standardization Administration of the People's Republic of China