Home / Standards / GB/T 23901.2-2009 GB/T 23901.2-2009 Abolished Non-destructive testing - Image quality of radiographs - Part 2: Image quality indicators (step/hole type) - Determination of image quality value 无损检测 射线照相底片像质 第2部分：阶梯孔型像质计 像质指数的测定 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