Home / Standards / GB/T 5019.4-2009 GB/T 5019.4-2009 Abolished Specification for insulating materials based on mica - Patr 4: Mica paper 以云母为基的绝缘材料 第4部分:云母纸 Standard Type GBT ICS 29.035.50 CCS K15 Status 废止 Issue Date 2009-06-10 Implementation 2009-12-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A