Home / Standards / GB/T 12128-1989 GB/T 12128-1989 Active Reference sources for the calibration of surface contamination monitors--Beta-emitters and alpha-emitters 用于校准表面污染监测仪的参考源 β发射体和α发射体 Standard Type GBT ICS 17.240 CCS F70 Status 现行 Issue Date 1989-12-29 Implementation 1990-07-01 Responsible Dept 国家标准委 Drafting Unit N/A