Home / Standards / GB/T 20229-2006 GB/T 20229-2006 Abolished Gallium phosphide single crystal 磷化镓单晶 Standard Type GBT ICS 29.045 CCS H83 Status 废止 Issue Date 2006-04-21 Implementation 2006-10-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A