Home / Standards / GB/T 5019.3-2009 GB/T 5019.3-2009 Active Specification for insulating materials based on mica - Part 3: Commutator separators and materials 以云母为基的绝缘材料 第3部分:换向器隔板和材料 Standard Type GBT ICS 29.035.50 CCS K15 Status 现行 Issue Date 2009-06-10 Implementation 2009-12-01 Responsible Dept 中国电器工业协会 Drafting Unit 中国电器工业协会