Home / Standards / GB/T 4724-1992 GB/T 4724-1992 Abolished Epoxide cellulose paper copper-clad laminated sheets for printed circuits 印制电路用覆铜箔环氧纸层压板 Standard Type GBT ICS 31.180 CCS L30 Status 废止 Issue Date 1992-07-08 Implementation 1993-04-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A