Home / Standards / GB/T 21219-2007 GB/T 21219-2007 Abolished Magnetic materials - Classification 磁性材料 分类 Standard Type GBT ICS 29.030 CCS K14 Status 废止 Issue Date 2007-12-03 Implementation 2008-05-20 Responsible Dept 中国电器工业协会 Drafting Unit N/A