Home / Standards / GB/T 8756-1988 GB/T 8756-1988 Abolished Collection of metallographs on defects of crystallinegermanium 锗晶体缺陷图谱 Standard Type GBT ICS 77.040.30 CCS H24 Status 废止 Issue Date 1988-02-25 Implementation 1989-02-01 Responsible Dept 国家标准委 Drafting Unit N/A