Home / Standards / GB/T 20874-2007 GB/T 20874-2007 Active Calculation of the effective parameters of magnetic piece parts 磁性零件有效参数的计算 Standard Type GBT ICS 29.100.10 CCS L19 Status 现行 Issue Date 2007-02-09 Implementation 2007-09-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A