Home / Standards / GB/T 27757-2011 GB/T 27757-2011 Active Reference electrodes for the measurement of pH value pH值测定用参比电极 Standard Type GBT ICS 71.040.01 CCS N53 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A