Home / Standards / GB/T 5020-2002 GB/T 5020-2002 Definitions and general requirements for mica-based insulating materials 以云母为基的绝缘材料定义和一般要求 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A