Home / Standards / GB/T 12634-1990 GB/T 12634-1990 Active Test methods for electroelastic constants of piezoelectric crystals 压电晶体电弹常数测试方法 Standard Type GBT ICS 31.140 CCS L32 Status 现行 Issue Date 1990-12-28 Implementation 1991-10-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A