Home / Standards / GB/T 12559-1990 GB/T 12559-1990 Active The patternes series for artwork master of printed circuits 印制电路用照相底图图形系列 Standard Type GBT ICS 31.180 CCS L39 Status 现行 Issue Date 1990-12-08 Implementation 1991-10-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A