Home / Standards / GB/T 4724-2017 GB/T 4724-2017 Active Composite base copper clad laminated sheets for printed circuits 印制电路用覆铜箔复合基层压板 Standard Type GBT ICS 31.180 CCS L30 Status 现行 Issue Date 2017-07-31 Implementation 2018-02-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A