Home / Standards / GB/T 11712-1989 GB/T 11712-1989 Abolished Dose conversion factors for use in protection against X,γ-ray external radiation 用于X、γ线外照射放射防护的剂量转换因子 Standard Type GBT ICS 13.280 CCS C57 Status 废止 Issue Date 1989-09-21 Implementation 1990-07-01 Responsible Dept 国家卫生健康委 Drafting Unit N/A