Home / Standards / GB/T 20634.4-2008 GB/T 20634.4-2008 Active Non-impregnated densified laminated wood for electrical purposes - Part 4: Specifications for individual materials - Rings produced from birch veneer 电气用非浸渍致密层压木 第4部分：单项材料规范 由桦木薄片制成的环材 Standard Type GBT ICS 29.035.99 CCS K15 Status 现行 Issue Date 2008-12-30 Implementation 2010-01-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A