Home / Standards / GB/T 4207-2012 GB/T 4207-2012 Abolished Method for the determination of the proof and the comparative tracking indices of solid insulating materials 固体绝缘材料耐电痕化指数和相比电痕化指数的测定方法 Standard Type GBT ICS 29.035.99 CCS K15 Status 废止 Issue Date 2012-12-31 Implementation 2013-06-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A