Home / Standards / GB/T 20504-2006 GB/T 20504-2006 Active Anodizing of aluminium and its alloys - Visual determination of image clarity of anodic oxidation coatings - Chart scale method 铝及铝合金阳极氧化 阳极氧化膜影像清晰度的测定 条标法 Standard Type GBT ICS 25.220.20 CCS H20 Status 现行 Issue Date 2006-09-26 Implementation 2007-02-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A