Home / Standards / GB/T 28552-2012 GB/T 28552-2012 Active Determination of acid number in transformer oils and turbine oils by BTB method 变压器油、汽轮机油酸值测定法(BTB法) Standard Type GBT ICS 75.100 CCS E38 Status 现行 Issue Date 2012-06-29 Implementation 2012-11-01 Responsible Dept 中国电力企业联合会 Drafting Unit N/A