Home / Standards / GB/T 12720-1991 GB/T 12720-1991 Active Measurement of power-frequency electric fields 工频电场测量 Standard Type GBT ICS 17.220.20 CCS K40 Status 现行 Issue Date 1991-02-01 Implementation 1991-10-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A