Home / Standards / GB/T 30140-2013 GB/T 30140-2013 Active Measuring method for the shielding effectiveness of magnetic material in low frequency alternating magnetic field 磁性材料在低频磁场中屏蔽效能的测量方法 Standard Type GBT ICS 17.220.99 CCS H21 Status 现行 Issue Date 2013-12-17 Implementation 2014-05-14 Responsible Dept 中国电器工业协会 Drafting Unit N/A