Home / Standards / GB/T 4722-1992 GB/T 4722-1992 Abolished Test methods for copper-clad laminatedsheets for printed circuits 印制电路用覆铜箔层压板试验方法 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