Home / Standards / GB/T 28609-2012 GB/T 28609-2012 Active Optical functional films - Polyethylene terephthalate(PET)-Determination of birefringence 光学功能薄膜 聚对苯二甲酸乙二醇酯(PET)薄膜 双折射测定方法 Standard Type GBT ICS 71.080.99 CCS G15 Status 现行 Issue Date 2012-06-29 Implementation 2012-12-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A