Home / Standards / GB/T 23981-2009 GB/T 23981-2009 Abolished Determination of contrast ratio of white and light coloured paints 白色和浅色漆对比率的测定 Standard Type GBT ICS 87.040 CCS G50 Status 废止 Issue Date 2009-06-02 Implementation 2010-02-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A