Home / Standards / GB/T 27755-2011 GB/T 27755-2011 Active Technical requirements of optical watermark anti-counterfeit 光学水印防伪技术条件 Standard Type GBT ICS 13.310 CCS A90 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 国家标准委 Drafting Unit N/A