Home / Standards / GB/T 7896-2008 GB/T 7896-2008 Active Test method for optical grade synthetic quartz crystal 人造光学石英晶体试验方法 Standard Type GBT ICS 73.080 CCS Q65 Status 现行 Issue Date 2008-06-30 Implementation 2009-04-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A